Hi @Ligitaaa. Thanks for being part of GoDaddy Community! As you may know, a 500 error is a very general error that means there's a problem with the website displaying, but the details aren't readily available. Invalid .htaccess files, or invalid rules in them, commonly cause 500 errors with Linux hosting accounts. If renaming your .htaccess and disabling plugins did not help, you can see if there are error logs to view. That would let you see what the root cause is. For cPanel and Managed WordPress accounts, there is usually an error_log file in the root directory of the website that contains the error log. Hope that helps.
JesseW - GoDaddy | Community Manager | 24/7 support available at x.co/247support | Remember to choose a solution and give kudos.