The portal won't let me see the nether, it just becomes transparent.

I just got a crash due to the bug. This is the report that minecraft generated :
https://paste.dimdev.org/unafayatob.mccrash
(edit : Normally I got more mods running but the screenshot was taken with the mods listed in the link. The issue is the same with my normal mods, but it doesn't usually crash)

The issue was caused by my shaders, I turned off Seus shaders and the portal does work.