psycheer X1aLeX When RP doesn't load on it own, you have something bad in there. You have to check if you're not using old pre1.20.3(1.20.2 and lower) RP on 1.20.3+
X1aLeX psycheer I just don't understand exactly what I need to do. I did a few more tests, tried to delete various items a little at a time, but nothing helped, I don't understand what exactly I need to do
psycheer X1aLeX backup your contents folder and then remove it, one by one add the asset folder back. Cannot give you better help. Make sure that you have not modded client