The client instantly crashes when it starts

So, I have a MacOs Mojave on version 10.14.6 and use MCreator version 2021.2 (my computer can't really run a more recent one).

I know there are many other errors with the test client, but I tried everything: deleted the Gradle folder, run client and server, try it with a brand new and empty workspace, nothing works, it just keeps crashing. here is the log of when i try opening the test client:

https://pastebin.com/hFeM8Qjf