FP4 Quickstep keeps stopping after A15 upgrade

[Lidwien]

Did you try the following :
Clear the cache of the app Quickstep.
Reboot your phone.

Clear the storage of the app Quickstep
Reboot your phone

Set NXTVision to Natural

Clear NXTVision

@Sandkasten

1. Go to Settings → Apps → All Apps → in the top right select Show System Apps
2. Search for the app NXTVision (it’s your display driver)
3. Delete Cache and all Data for this app and force close it
4. Download and install the October Play System Update (in the Settings app under security and updates)
5. After the download, when your phone asks to Reboot, do so.