'There is an internal problem with your device...' error ) After Flashing Aosp Exten

[coldestday]

Dear friends. I did a clean wipe with four wipe , didn't wipe vendor. And flash Aex latest rom. It shows that error 'there is an internal problem with your device contact your manufacturer for details' when it get setup (welcome) screen.
I can't solve that problem since a few days. Please say me how i solve it. Thanks for all.

 

[zaqm]

Hi,
what was you previous rom?

 

[coldestday]

Hi,
what was you previous rom?

It was same Aex 6.1 . Is problem about vendors maybe?

 

[zaqm]

Yes, they recommend a clean flash between roms because they are very different. Wipe System, Data, Cache, Dalvik and Vendor and flash the rom again - use latest official TWRP (3.2.3.1)