Can Not activate skp

I cant activate smart keyboard pro on my Sony xperia xz.
IT always appears swiftkey after reboot.
Please help, Tom

Update: i solved the Problem because i downloaded the xperia Keyboard from apk Mirror.

Are you sure SK hasn’t been installed to the SD card instead of internal memory? That would explain why it’s reset after reboot. If that isn’t the case I have no idea why that happens.

Yes i am sure.
Bv the Problem is solved,pk is running.
Thank u for your help.