I keep getting a warning that I'm running an unstable version of immersive portals. I'm currrently running minecraft ver 1.20.1. I made sure that cloth config Api was added as well. I can see throught the portal just fine but the moment I got through it my game starts teleporting me in and out of the nether and into the overworld and then it crashes.

i am pretty shure that's a warning from the devs about how "in development" the current version is and isn't in itself an error