I can't create a world

Link to the launcher console log (if you have access to the ‘Save log’ button):

Description of the problem:

After launching the modpack, I cannot create a singleplayer world, and it crashes with a crash log.

Go to the launcher settings and set Xmx and Xms as shown in the image (remember to uncheck the first option)

If you still have problems, change Xmx to 4000MB, but be careful: you need to close background applications (e.g. browser, Discord, etc.) because you only have 8GB of RAM in your PC