I can't open the world editor when using a resource pack

I was using a resource pack I made and tried to open the world editor. I was stuck on a loading screen. But after I unlocked the resource pack, I was able to open it without any issues. I think this is probably because the world editor reverted to the previous one.

You can see the video below, but it hides the parts we don't want you to see.

1.mp4