Can you try the cache cleaner? https://emps-world.net/uninstall Also, restarting your computer may resolve the issue.
If that doesn't work, please give me information on your graphics card. Have you recently updated your drivers, has it worked fine before?

EDIT: The reason is probably that the new client background is too large to be stored on your graphics card. I'll see to provide you with a work around.

It worked yesterday and I'll try restarting and updating the drivers but I wont uninstall I'll just redownload the file opengl if you can gimme it

Restart your client and let me know if it works now? Btw, does ::vbomode work for you?

And no Vbomode doesn't work for me, sometimes I insta crash and sometimes ending task doesn't work or ending process so I have to restart the computer.

I tried restarting the computer but it still didn't work.

Can you restart the client and tell me if it works now?