I have Moodle installed on two sites, one using https and the other not (the second one is a sort of 'control' to check out problems like this one!). Both sites are now upgraded to Moodle 3.4, but this problem emerged immediately after installation, with Moodle 3.2.
The only themese which load properly are Clean and More. Boost, Academi and Klass don't load the stylesheets, and I notice from the plugin overview list that the last two require Boost, while More requires Clean. I get a similar error message on both sites, although the attached image is from the https one.
I would be really grateful for any help or advice on this.
Anne
