Important Please help with User Profile privacy

I tried to press a default as you said and now I got this error:

500 - Internal Server Error
This is a temporary server error.
Please try to reload the webpage later.
If you are the webmaster of this site please log in to Cpanel and check the Error Logs. You will find the exact reason for this error there.

Common reasons for this error are:

Incorrect file/directory permissions: Above 755. In order files to be processed by the webserver, their permissions have to be equal or below 755. You can update file permissions with a FTP client or through cPanel's File Manager.
Incorrect Apache directives inside .htaccess file. Make sure you have not specified unsupported directives inside the local .htaccess file. Such include PHP settings and Apache module settings.

can you help me out to fix it now? I broke something and got this error message after I hit default in kunena configuration. I can not go to my forum at all now.

here is the error message:

500 - Internal Server Error
This is a temporary server error.
Please try to reload the webpage later.
If you are the webmaster of this site please log in to Cpanel and check the Error Logs. You will find the exact reason for this error there.

Common reasons for this error are:

Incorrect file/directory permissions: Above 755. In order files to be processed by the webserver, their permissions have to be equal or below 755. You can update file permissions with a FTP client or through cPanel's File Manager.
Incorrect Apache directives inside .htaccess file. Make sure you have not specified unsupported directives inside the local .htaccess file. Such include PHP settings and Apache module settings.

As you don't have a .htaccess file, a lot of that error report is meaningless. There may be some benefit in reviewing your file security (read Securing Kunena ). That's what those "755" number were about.

It might also be advisable to consider re-installing Kunena, too. It looks like your site is in a mess and you may also need to seriously consider restoring your site from your last good backup. The kinds of things mentioned in this discussion are unusual, extraordinary and not normal. I don't have specific answers for every possible way that users can engineer things.

so, you think that the best way is to uninstall existing kunena and then install again? where is a good version of kunena? and it should be 1.6 version, correct?

i went to a cpanel. yes i do have htaccess file. I also checked all files permission codes and they are either 644 or 755, except one, which is 444. it also says about something in htaccess file. something about PHP settings. what does it mean? i do have PHP in the code and not ones.

can someone explain this to me please?

Are you sure it's a file named . htaccess ("dot"-htaccess)? There is a htaccess.txt file - this isn't the same thing.

Your folders should all be set with permission = 755
Your files should be set with permission = 644

But, to be honest with you, I don't know why you're wasting your time going down this expensive, time-consuming path. It would be much simpler if you just restored your site from your last working backup. Now wouldn't it?