Internal Server Error when changing PHP Version

The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator at [no address given] to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.
Apache/2.4.25 (FreeBSD) mpm-itk/2.4.7-03 PHP/5.6.30 Server at abcde.se Port 80.

Can solve the problem: Renamne .htaccess

Then Update permlinks