Hello Christian,
This issue appears to have been caused by a recent Joomla update.
First check compile scss to css is enabled or not in template options, If disable please enable it. Then clear Browser and Joomla Cache. Then check again.
If its not work, Then Follow these:
If you have a backup of your site, please try the following:
- Run the backup site on a separate directory.
- Export your template settings from the backup site.
- On your live site, update Helix Ultimate 2.1.2 and then import the saved settings.
This should help restore your design.
Follow this documentation: www.joomshaper.com/documentation/helix-framework/advanced#import-and-export
If you don’t have a backup, you may need to manually reapply the missing CSS to fix the issue.
I sincerely apologize for the inconvenience. Please let us know if you need further assistance.
Best regards,