Loading terrain bug - I can't join my main minecraft world

I'm a content creator so I was recording a minecraft video. I was trying to get all 1.19 advancements and I went to the nether but when I entered the portal, the world bugged and stayed on loading terrain.

What I expected to happen was...:

I expected to go into the nether

What actually happened was...:

I got a loading screen.

 

I need to solve this problem asap, this world is huge and I can't lose it.