Hello,
i bought a new P2. I installed the app "DBK TAN2go". The App did not start. It show a Message, that on my phone are maybe several Apps which are not secure, like "Cleander Apps" (CCLeaner, Cleannmaster) or "Battery Tools" (Battery Doctos, Battery Save) or "Screenreader" (Google Talkback).
https://www.dkb.de/info/banking_app/hinweis/

On my BV6000 the App "DKB TAN2go" works fine. There are no problems.

So, why did the app dont work on the P2.

Can you help me please?

Best Regards

I guess your ROM version is signed with test keys. Which firmware version are you using? Please update to the latest version.
I will request that the next release will be signed correct.

I think the problem has to do with google's safety net ....

1) Safety net normally refuses to accept custom roms and if that is the problem , you have to wait for blackview to propery cerify their rom

2) Safety net will not accept rooted devices , except if you have installed magisk systemless root , so DONT ROOT YOUR DEVICE
Do a fresh reinstalll with the sp flashtool . dont root , do do anything else , just try run adb tan2go and see if works. It it doesnt then its solution No1 , and you have to wait .
3) Things like ccleaner , battery save , screen reader will not be accepted by dbk tan2go - they are a security risk

4) Try marshmallow and see if you have the same problem