To fix this add the following lines to .htaccess
AddHandler fcgid-script .html .htm FcgidWrapper /storage/configuration/wrappers/XX/YYYYXX/domain.tld/php-wrapper
The path here is unique for each customer, and is built by
/storage/configuration/wrappers/ + [last two digits of customer number (xx)] + [full customer number (
yyyyxx) ] + [domain.tld] +
Where XX = those last two digits of your customer number and YYYYYY = Your full customer number.