I have opened a Minecraft realm server and inside this Minecraft realm server, there have about 40 data packs. When I close the realm and reset the world, I can't go in anymore. The world I reset only deleted 1 data pack and change nothing else. My friends can still go into the realm but only I cant. I try to switch to another world and reset the world to the one I need, it also didn't work for me. However, I try to go to the world before 2 days, I succeed. But the progress is far back behind, a lot of our houses and buildings are gone. No matter how many times I tried, it also shows 'internal server error' on the screen and I can't go into the realm. I reopen the Minecraft realm, again and again, the issue is still the same for me. I can go into the singleplayer and multiplayer server, but not the realm. I have tried to change my Minecraft JVM ARGUMENTS from '-Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M' to '-Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M', it still didn't work for me. I try to remove the player data and also the player stats folder, it didn't work also. I put them back and try again, didn't work also. I have to reinstall Minecraft to try again, it still didn't work for me. I restart my computer, but it is still the same.

My Minecraft realm server name is 'Egal' and the realm description is 'Because of lag del a lot mod '