Purchased SiteOrigin Premium – Missing Cache.php files

I have installed all modules and themes and double checked their content 1:1

After installing SiteOrigin products, the site has a PHP error and returns blank.

Looking into php-error.log it turns out it is a serie of missing Cache.php files.

[14-Mar-2018 06:09:09 UTC] PHP Warning: require_once(/var/www/domain.dk/public_html/wp-content/plugins/so-widgets-bundle/base/inc/lib/Less/Cache.php): failed to open stream: No such file or directory in /var/www/domain.dk/public_html/wp-content/plugins/so-widgets-bundle/base/inc/lib/Less/Parser.php on line 3
[14-Mar-2018 06:09:09 UTC] PHP Fatal error: require_once(): Failed opening required ‘/var/www/domain.dk/public_html/wp-content/plugins/so-widgets-bundle/base/inc/lib/Less/Cache.php’ (include_path=’.:/usr/share/php:/usr/share/pear’) in /var/www/domain.dk/public_html/wp-content/plugins/so-widgets-bundle/base/inc/lib/Less/Parser.php on line 3

.. Fixing one file returns another error. I cannot find any similar examples by searching forums for SiteOrigin or WordPress in general. Chmod is 770 in general in case these classes are supposed to generate themselves.

I have been in touch with the hosting company, to hear if any PHP commands are blocked for security purposes since the files are not being generated. There should not be.

Funny enough, the site has run – but it seems this is an issue with later WordPress installs.