Incorrect root directive after snippet application in ISPConfig 3.3 Beta 1

After installing ISPConfig 3.3 Beta 1, none of my websites were working – they all returned a 404 - not found error.

After investigation, I found that the issue is related to the way directive snippets are applied.

Example:

In my snippet, I have:

##subroot htdocs/public/web ##

After applying the snippet, the resulting nginx configuration contains:

root /var/www/example.com/webhtdocs/public/web;

A slash is missing between web and htdocs.