App is not allowed to run after Android 16 Upgrade

[rgagne@videotron.ca]

Hi, anyone else having this issue?

My phone (Google Pixel 6 pro) updated to Android 16 yesterday.

Following the update, PowerFTP is not allowed to run anymore, and the system displays these 2 messages:

1) INSTALLED FROM INVALID SOURCE

2) The Integrity of this app is not valid. Please get it on google play. This app will finish now.

I tried uninstalling and re-installing from google play store (which is where it came from at first, anyway), but same result, the app will not run.

any one has a solution ?