WHMCS Integration /includes/css 404 error

Hi Team,

in my console, I can see 404 errors when accessing the client page I have set up:

/wp-content/plugins/whmcs-wordpress-integration/includes/css/whmcs-six.css?ver=1.4.3

In the plugin folder, there is no folder “css” under “includes”. Even when I create one there is no whmcs-six.css?ver=1.4.3 written into this folder (/includes/css).

CHMOD is set to 755 for wp-content, plugins, etc.

In the plugin settings, I have a notice PHP open_basedir is on.

Do you have any idea what could be causing these errors?

When checking the “cache” folder, I can see that the plugin is able to write there. I can delete files in the cache folder and there are new ones written automatically.

Kind regards,

Bernhard