Hi Nebulon,
Thank you for your clear explanation and for taking the time to respond publicly.
I understand now why the App Store no longer works with Cloudron 7.4.1.
As part of my systems and network administration internship, I have been working on a Nextcloud migration scenario involving legacy Cloudron installations.
Following the advice received here, I updated my test environment and successfully restored a Nextcloud backup using the Cloudron REST API.
My current test environment consists of:
Source: Cloudron 10.0.4
Destination: Cloudron 10.1.5
Nextcloud package: 4.17.0
I am now completing the functional checks, particularly user accounts, file integrity, sharing permissions and authentication.
Your explanation confirms that upgrading Cloudron was the appropriate approach.
Thank you again for your support and for helping me better understand the technical limitations of older Cloudron versions.
Best regards,
Romuald