A player has this error in his logs:
[15:14:48] [Render thread/INFO]: Reloading ResourceManager: vanilla
[15:14:50] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brushing
[15:14:50] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brush_sand_completed
[15:14:50] [Render thread/WARN]: Missing sound for event: minecraft:item.goat_horn.play
[15:14:50] [Render thread/WARN]: Missing sound for event: minecraft:entity.goat.screaming.horn_break
[15:14:50] [Render thread/WARN]: Missing sound for event: minecraft:music.overworld.cherry_grove
[15:14:50] [Render thread/INFO]: OpenAL initialized on device Audio Pro T3
[15:14:50] [Render thread/INFO]: Sound engine started
[15:14:50] [Render thread/INFO]: Created: 1024x512x4 minecraft:textures/atlas/blocks.png-atlas
[15:14:51] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/signs.png-atlas
[15:14:51] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/shield_patterns.png-atlas
[15:14:51] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/banner_patterns.png-atlas
[15:14:51] [Render thread/INFO]: Created: 1024x1024x4 minecraft:textures/atlas/armor_trims.png-atlas
[15:14:51] [Render thread/INFO]: Created: 64x64x4 minecraft:textures/atlas/decorated_pot.png-atlas
[15:14:51] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/chest.png-atlas
[15:14:51] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/shulker_boxes.png-atlas
[15:14:51] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/beds.png-atlas
[15:14:51] [Render thread/WARN]: Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program.
[15:14:51] [Render thread/INFO]: Created: 256x256x0 minecraft:textures/atlas/particles.png-atlas
[15:14:51] [Render thread/INFO]: Created: 256x256x0 minecraft:textures/atlas/paintings.png-atlas
[15:14:51] [Render thread/INFO]: Created: 128x128x0 minecraft:textures/atlas/mob_effects.png-atlas
[15:15:24] [Render thread/INFO]: Connecting to PLAY.ELIAZE.FR, 25565
[15:15:25] [Render thread/WARN]: Unknown custom packed identifier: minecraft:register
[15:15:25] [Netty Epoll Client IO #0/INFO]: Found file /home/antoine/snap/launcher-ot-minecraft/79/.minecraft/server-resource-packs/2052d1aa174b0c07a8a0f84f429bfca6c0a00213 matching requested hash 343c9c26ddd4ee605e2d50946e4f8890ac3c6e8a
[15:15:25] [Netty Epoll Client IO #0/INFO]: Applying server pack /home/antoine/snap/launcher-ot-minecraft/79/.minecraft/server-resource-packs/2052d1aa174b0c07a8a0f84f429bfca6c0a00213
[15:15:25] [Render thread/WARN]: Unknown custom packed identifier: minecraft:register
[15:15:25] [Render thread/INFO]: [System] [CHAT] Vous êtes automatiquement connecté car vous utilisez un compte unique.
[15:15:26] [Render thread/WARN]: Ignoring player info update for unknown player 0806b8e3-6bbc-41b2-b105-de838a9a34e3
[15:15:26] [Render thread/WARN]: Ignoring player info update for unknown player f85433e4-034d-463f-b9ab-d26e5d06571e
[15:15:26] [Render thread/WARN]: Unknown custom packed identifier: labymod3:main
[15:15:26] [Render thread/WARN]: Unknown custom packed identifier: legacy:lmc
[15:15:26] [Render thread/WARN]: Missing metadata in pack file/ComplementaryReimagined_r1.4.zip
[15:15:26] [Render thread/INFO]: Reloading ResourceManager: vanilla, server
[15:15:26] [Render thread/INFO]: Loaded 3 advancements
[15:15:26] [Worker-Main-2/WARN]: Invalid path in datapack: twitteremojis:textures/font/EMOJI-LICENSE.txt, ignoring
[15:15:26] [Worker-Main-5/WARN]: Missing sprite: minecraft:textures/nocsy/toffy_yarn.png
[15:15:26] [Worker-Main-5/WARN]: Missing sprite: minecraft:textures/nocsy/toffy_yarn.png
[15:15:27] [Worker-Main-5/WARN]: Texture minecraft:entity/fishing_hook with size 8x8 limits mip level from 4 to 3
[15:15:27] [Worker-Main-5/WARN]: minecraft:textures/atlas/blocks.png: dropping miplevel from 4 to 3, because of minimum power of two: 8
[15:15:28] [Worker-Main-3/WARN]: Unable to load model: 'minecraft:paper' referenced from: minecraft:paper#inventory: java.io.FileNotFoundException: minecraft:models/paper.json
[15:15:29] [Worker-Main-3/WARN]: Missing textures in model minecraft:leather_horse_armor#inventory:
minecraft:textures/atlas/blocks.png:minecraft:nocsy/toffy_yarn
[15:15:29] [Worker-Main-3/WARN]: Missing textures in model minecraft:paper#inventory:
minecraft:textures/atlas/blocks.png:hmccosmetics:item/block/jetpack
minecraft:textures/atlas/blocks.png:minecraft:item/jeqo/icons/scroll_middle2
[15:15:29] [Worker-Main-2/WARN]: Invalid path in datapack: twitteremojis:textures/font/EMOJI-LICENSE.txt, ignoring
[15:15:30] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brushing
[15:15:30] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brush_sand_completed
[15:15:30] [Render thread/WARN]: Missing sound for event: minecraft:item.goat_horn.play
[15:15:30] [Render thread/WARN]: Missing sound for event: minecraft:entity.goat.screaming.horn_break
[15:15:30] [Render thread/WARN]: Missing sound for event: minecraft:music.overworld.cherry_grove
[15:15:30] [Render thread/INFO]: OpenAL initialized on device Audio Pro T3
[15:15:30] [Render thread/INFO]: Sound engine started
[15:15:31] [Render thread/INFO]: Created: 4096x4096x3 minecraft:textures/atlas/blocks.png-atlas
[15:15:31] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/signs.png-atlas
[15:15:31] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/shield_patterns.png-atlas
[15:15:31] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/banner_patterns.png-atlas
[15:15:31] [Render thread/INFO]: Created: 1024x1024x4 minecraft:textures/atlas/armor_trims.png-atlas
[15:15:31] [Render thread/INFO]: Created: 64x64x4 minecraft:textures/atlas/decorated_pot.png-atlas
[15:15:31] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/chest.png-atlas
[15:15:31] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/shulker_boxes.png-atlas
[15:15:31] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/beds.png-atlas
[15:15:31] [Render thread/WARN]: Shader rendertype_entity_translucent could not find uniform named IViewRotMat in the specified shader program.
[15:15:31] [Render thread/WARN]: Shader rendertype_entity_translucent could not find uniform named FogShape in the specified shader program.
[15:15:31] [Render thread/WARN]: Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program.
[15:15:31] [Render thread/INFO]: OpenGL debug message: id=1, source=SHADER COMPILER, type=ERROR, severity=HIGH, message='0:28(2): error: `return' with wrong type int, in function `get_id' returning float'
[15:15:31] [Render thread/INFO]: Caught error loading resourcepacks, removing all selected resourcepacks
java.util.concurrent.CompletionException: java.lang.RuntimeException: could not reload shaders
at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[?:?]
at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:320) ~[?:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:722) ~[?:?]
at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
at aln.a(SourceFile:69) ~[1.19.4.jar:?]
at bco.d(SourceFile:156) ~[1.19.4.jar:?]
at bcs.d(SourceFile:23) ~[1.19.4.jar:?]
at bco.x(SourceFile:130) ~[1.19.4.jar:?]
at bco.br(SourceFile:115) ~[1.19.4.jar:?]
at emh.f(SourceFile:1174) ~[1.19.4.jar:?]
at emh.e(SourceFile:801) ~[1.19.4.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:237) ~[1.19.4.jar:?]
Caused by: java.lang.RuntimeException: could not reload shaders
at fhz.b(SourceFile:559) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:437) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:414) ~[1.19.4.jar:?]
at alm.a(SourceFile:13) ~[1.19.4.jar:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
... 9 more
Caused by: adg: Invalid shaders/core/rendertype_text.json: Couldn't compile vertex program (server, rendertype_text) : 0:28(2): error: `return' with wrong type int, in function `get_id' returning float
at adg.a(SourceFile:48) ~[1.19.4.jar:?]
at fir.<init>(SourceFile:203) ~[1.19.4.jar:?]
at fhz.b(SourceFile:545) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:437) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:414) ~[1.19.4.jar:?]
at alm.a(SourceFile:13) ~[1.19.4.jar:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
... 9 more
Caused by: java.io.IOException: Couldn't compile vertex program (server, rendertype_text) : 0:28(2): error: `return' with wrong type int, in function `get_id' returning float
at egs.b(SourceFile:69) ~[1.19.4.jar:?]
at egs.a(SourceFile:51) ~[1.19.4.jar:?]
at fir.a(SourceFile:242) ~[1.19.4.jar:?]
at fir.<init>(SourceFile:185) ~[1.19.4.jar:?]
at fhz.b(SourceFile:545) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:437) ~[1.19.4.jar:?]
at fhz$1.a(SourceFile:414) ~[1.19.4.jar:?]
at alm.a(SourceFile:13) ~[1.19.4.jar:?]
at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?]
... 9 more
[15:15:31] [Render thread/WARN]: Missing metadata in pack file/ComplementaryReimagined_r1.4.zip
[15:15:31] [Render thread/INFO]: Reloading ResourceManager: vanilla, server
[15:15:32] [Worker-Main-1/WARN]: Invalid path in datapack: twitteremojis:textures/font/EMOJI-LICENSE.txt, ignoring
[15:15:32] [Worker-Main-5/WARN]: Missing sprite: minecraft:textures/nocsy/toffy_yarn.png
[15:15:32] [Worker-Main-5/WARN]: Missing sprite: minecraft:textures/nocsy/toffy_yarn.png
[15:15:33] [Worker-Main-5/WARN]: Texture minecraft:entity/fishing_hook with size 8x8 limits mip level from 4 to 3
[15:15:33] [Worker-Main-5/WARN]: minecraft:textures/atlas/blocks.png: dropping miplevel from 4 to 3, because of minimum power of two: 8
[15:15:34] [Worker-Main-4/WARN]: Unable to load model: 'minecraft:paper' referenced from: minecraft:paper#inventory: java.io.FileNotFoundException: minecraft:models/paper.json
[15:15:35] [Worker-Main-4/WARN]: Missing textures in model minecraft:leather_horse_armor#inventory:
minecraft:textures/atlas/blocks.png:minecraft:nocsy/toffy_yarn
[15:15:35] [Worker-Main-4/WARN]: Missing textures in model minecraft:paper#inventory:
minecraft:textures/atlas/blocks.png:hmccosmetics:item/block/jetpack
minecraft:textures/atlas/blocks.png:minecraft:item/jeqo/icons/scroll_middle2
[15:15:35] [Worker-Main-1/WARN]: Invalid path in datapack: twitteremojis:textures/font/EMOJI-LICENSE.txt, ignoring
[15:15:36] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brushing
[15:15:36] [Render thread/WARN]: Missing sound for event: minecraft:item.brush.brush_sand_completed
[15:15:36] [Render thread/WARN]: Missing sound for event: minecraft:item.goat_horn.play
[15:15:36] [Render thread/WARN]: Missing sound for event: minecraft:entity.goat.screaming.horn_break
[15:15:36] [Render thread/WARN]: Missing sound for event: minecraft:music.overworld.cherry_grove
[15:15:36] [Render thread/INFO]: OpenAL initialized on device Audio Pro T3
[15:15:36] [Render thread/INFO]: Sound engine started
[15:15:37] [Render thread/INFO]: Created: 4096x4096x3 minecraft:textures/atlas/blocks.png-atlas
[15:15:37] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/signs.png-atlas
[15:15:37] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/shield_patterns.png-atlas
[15:15:37] [Render thread/INFO]: Created: 512x512x4 minecraft:textures/atlas/banner_patterns.png-atlas
[15:15:37] [Render thread/INFO]: Created: 1024x1024x4 minecraft:textures/atlas/armor_trims.png-atlas
[15:15:37] [Render thread/INFO]: Created: 64x64x4 minecraft:textures/atlas/decorated_pot.png-atlas
[15:15:37] [Render thread/INFO]: Created: 256x256x4 minecraft:textures/atlas/chest.png-atlas
[15:15:37] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/shulker_boxes.png-atlas
[15:15:37] [Render thread/INFO]: Created: 512x256x4 minecraft:textures/atlas/beds.png-atlas
[15:15:37] [Render thread/WARN]: Shader rendertype_entity_translucent could not find uniform named IViewRotMat in the specified shader program.
[15:15:37] [Render thread/WARN]: Shader rendertype_entity_translucent could not find uniform named FogShape in the specified shader program.
[15:15:37] [Render thread/WARN]: Shader rendertype_entity_translucent_emissive could not find sampler named Sampler2 in the specified shader program.
[15:15:37] [Render thread/INFO]: OpenGL debug message: id=2, source=SHADER COMPILER, type=ERROR, severity=HIGH, message='0:28(2): error: `return' with wrong type int, in function `get_id' returning float'
[15:15:37] [Render thread/WARN]: Missing metadata in pack file/ComplementaryReimagined_r1.4.zip
[15:15:37] [Render thread/WARN]: Reload already ongoing, replacing
[15:15:37] [Render thread/INFO]: Reloading ResourceManager: vanilla
When he joins the server the pack is downloaded but he is kicked immediately after. A message appears saying "resource reload failed".