If you have the microG Exposure Notification version installed and plan to update to the newly released 0.14-p or 0.14-q, please carefully read the release notes:
"microG EN update
The new microG version add some improvement in the Exposure Notification API. Unfortunately, the update we shared on Apps doesn’t apply automatically. To apply it manually, you have to:
1. Open Apps
2. In Search
tab, search for microg
3. Tap on Update
If you apply the v0.14 update before having update microG, microG EN will be uninstalled. In case it happens, no worry:
1. From your device, download and install manually microG EN version:
Be sure we will do our best to avoid this inconvenience in the future!"
This means you have to apply the microG update in Apps before updating the OS, if you don’t want to manually install the APK afterwards.
(Alternatively you can try to force stop Apps and clear its storage in the Settings, then search for microg in Apps and install the Exposure Notification version again. Tested for you by somebody who read the notes but only got what they meant afterwards, well it’s late .)