Friend getting disconnected from minecraft server with modpack prominence 2 rpg

[Saladorx1]

Ok, so my friend has been trying to enter my minecraft modded server but he keeps getting these errors:
Internal Exception: java.lang.StringIndexOutOfBoundsException: offset 108, count 101, length 141
and
Internal exception: net.minecraft.class_151: Non [a-z0-9/._-] Character in path of location: minecraft:daf\uFFFD\uFFFD\uFFFD\uFFFD\\U\uFFFD\u00115\u0011\uFFFDzK\uFFFDQo, \uFFFD\uFFFD)\uFFFd\uFFFD(
Logs:
https://mclo.gs/AQjtPE8

[TileEntity]

Looks like an issue with the mod emi_loot

[Saladorx1]

What could he do then?

Edited June 16 by Saladorx1

[TileEntity]

Make a test without this mod

[Saladorx1]

Still, he cant join.
https://mclo.gs/6dRIo5t

[TileEntity]

Then it is an issue or conflict with ad_astra_giselle_addon and modmenu

Invalid mod icon for icon source ad_astra_giselle_addon: icon.png
java.nio.file.NoSuchFileException: /icon.png

I have no idea how to fix it - maybe try other builds

 

[Saladorx1]

Also, before he disconnects this appears on the log: 

[18:07:30] [Render thread/WARN]: Failed to get file path of mod fastpaintings: /

2648[18:07:30] [Render thread/WARN]: Failed to get file path of mod moonlight: /

2649[18:07:30] [Render thread/WARN]: Failed to get file path of mod dummmmmmy: /

2650[18:07:30] [Render thread/WARN]: Failed to get file path of mod amendments: /

2651[18:07:30] [Render thread/WARN]: Failed to get file path of mod supplementaries: /
Does this have anything to do with the error?

[TileEntity]

Maybe

Try another Launcher like AT Launcher or MultiMC

[Saladorx1]

We tried but now it doesnt even load, it gets stuck on loading.
https://mclo.gs/sYJGdXx

[TileEntity]

Maybe an issue with Xaeros_Minimap

[Saladorx1]

Should he change the mod to a lower version or reinstall it?

[TileEntity]

First a test without it

[Saladorx1]

it still gets stuck
https://mclo.gs/rezFM7J

[TileEntity]

I have no idea - maybe something outside of Minecraft like Firewall or Antivirus program

[Saladorx1]

We did it and it still keeps getting stuck

[TileEntity]

Maybe switch to another build of this modpack or contact the modpack owner