Hi there!

Thank you for bringing this to our attention, and I sincerely apologize for the inconvenience caused.

To assist you more effectively, may I kindly request temporary administrative access to your site? This will allow me to thoroughly investigate and resolve the issue for you.

Before sharing the credentials, I strongly recommend taking a complete backup of your site to ensure all data remains secure.

Looking forward to your response.

Best regards

same happeningn for template revibe

same with shaper_aspasia - Default shaper_spectrum - Default shaper_rhino - Default

Is your Behaviour - Backward Compatibility plugin is enabled?

We apologize for the inconvenience.

Just to confirm, the error is occurring while the Behaviour - Backward Compatibility plugin is disabled during the Joomla upgrade process, correct?

Please try the following:

1. Disable the Behaviour - Backward Compatibility plugin.
2. Proceed with the Joomla update to 6.1.3.
3. Once the update is completed successfully, re-enable the Behaviour - Backward Compatibility 6 plugin.

This should resolve the issue and allow the upgrade to complete properly.

Before proceeding, however, please make sure to take a full backup of your website and database so you can restore the site if anything unexpected occurs during the update.