OK, I don’t know how, but suddenly I’m in recovery with TWRP running 
Now I tried to sideload the latest dev build e-0.7-n-2019112732147-dev-peregrine.zip
trying to follow the instructions for updating with a computer found here: [HOWTO] Update /e/
But sideloading the file doesn’t work. See the attached screenshots on my pc and phone.
Do any of the failure messages hint to what is wrong?
Since I don’t know how I got back into TWRP I just keep my phone connected to the pc and hope it will stay in recovery mode. If you have any clues, please let me know.
Thnx