hi Martin,
strange things happen ... the error has now been fixed.
Several email clients that had been installed as a test showed the same error ("E-mail", WEB.DE etc.) ... apparently the same display module is used in the background by all of them (something from Chrome
) and that apparently no longer worked.
The error was corrected by several (!) restarts of the "P20 pro". The reason for the error could have been "some update for something"
woschx
P.S.: my OS is "EMUI 10.0.0", Build 10.0.0.193