Hi there,

Thanks for contacting us. Sorry for the inconvenience. Will you please provide me the Joomla correct administrator access to check the issue? I will check & get back to you soon. 

-Thanks

Hi Mentioned user data should work now. Sorry for the inconvenience.

I have created a test article. Please check. Thanks

Yo are able to crate articles in the backend, but if you're logged in at the frontend (try: https://gain-advisors.com/de/blog-beitrag-erstellen) you get Call to undefined method Joomla\CMS\Helper\MediaHelper::getCleanMediaFieldValue()

Did you modified core file of Helix and Page Builder? If not, Download the Helix Ultimate plugin and install it on your site. Thanks

Note: Keep a backup of your site before install Helix Plugin.

Of course no core changes. I just installed the actual plugin again (2.0.10) but no effect.

Please check now. Thanks

Everythings fine now. Would you share the secret behind the issue?

I just updated Helix Plugin and Template. Then I have replaced the media.php file on this file location.

templates/gain21/html/layouts/joomla/form/field/media.php