After updating to version 23.10.2, if you encounter the issue described:
Navigate to the "Applications" tab in the settings.
Select "Unset pool".
Once you've done that, observe where it says "Initializing Apps Service"; it should stop.
Next, reselect the pool where your applications are located.
Now, observe that "Initializing Apps Service" should work correctly.
(5/11/24) spent much time to troubleshoot the issue of apps can't be deployed. Very likely due to the Pool permission to be set as apps for some reasons.
The local path in ix-applications is :./releases/home-assistant/volumes/ix_volumes/config/backups/25a82abc.tar
It seems that I copy need copy the data folder as ./releases/home-assistant/volumes/ix_volumes/config/
Thanks much, always scary when you run an update and everything breaks. This just saved me going from 25.04 to 25.10