Refs #4499 #4941 Adding <IfModule !mod_authz_host.c> around the Satisfy any which may fix the issue.

To test run the following command in the piwik directory:
```
rm js/.htaccess plugins/.htaccess core/.htaccess libs/.htaccess vendor/.htaccess  misc/user/.htaccess
```
(this deletes all current htaccess files)

Then visit the System check page
(this re-creates the .htaccess files)

Then browse Piwik -> is it working fine?

If not, check your error log and please paste error as a comment in the ticket.