In reply to henri9009:
one problem I know you are facing is java is outdated.
the other problem I cant find until java is uninstalled and reinstalled.
Uninstall and reinstall java, very likely to be fixed.
In reply to k1llerz_127:
if still having problems after step 3.5, you need to uninstall and reinstall java. Than if still stuck do step 4.
Check if it persists for a full day
reinstall forge and minecraft and any other similar applications
If using mods, remove them all and add them back individually until it works. This can take days.
If using mods, the mods with different version numbers than minecraft version are incompatible- without coding or using a special launcher.
If you got here and the minecraft version is not working and discussion board wont help, talk to some sort of support.
In reply to jxjeks:
you probably will not be able to play on the world again. If an entire day passes and the problem persists, then you likely wont be able to play on the world again. If this is the case:
things to check:
are all mods matching version with your minecraft version?
is mixin being used?
if the first question is a yes and the second question is a no, you need to create a new world adding back the mods one by one to see the cause.
Else if first question is a no , than fix it. If the second question is a yes, list mods and crash file and hope someone else can help.
In reply to cappic2:
Unless you want to learn/try intellij idea or a different great java editor, I am assuming you cant. If you do want to try/learn, put the jar file in the idea folder, you have to restart intellij or be patient to have it show up. Once that is done open the jar as a library and then you should be able to make it work assuming willingness to learn.