It seems that Asset 7.4 no longer works with the latest QNAP firmware on my TS-251.
The QNAP event log says that Asset has an invalid digital signature. The app has stopped and cannot be installed on QTS.

Error 2022-09-18 10:49:43 --- --- Web Desktop App Center App Installation [App Center] Asset has an invalid digital signature. The app has stopped and cannot be installed on QTS. You can remove it in the App Center.

Has anyone found of a solution or workaround?