I would like to ask for advice.
I buyed DAVdroid from Google Play store. I want to use synchronization with Synology NAS.
After I set new DAVdroid connection application suddenly shows message "....was deinstalled" or "...is not installed" or something like this.
And really, application is missing. I restarted S7 and try to reinstall it. But I have only one option: buy it again via Google Play store. It is not acceptable.
Maybe I am not registered as valid user for this application or....hard to say
Samsung Galaxy S7 Edge
Questions are:why DAVdroind was suddenly deinstalled? why I need to pay again for reinstallation?
Could you pls advice how to resolve this?