ESP32 timeout error on webinterface

I’m having similar problems as Stuck at accessing ESP32 - #30. I have seen a lot of timeout error messages. After I realized that the USB adapter is still running on 5V and I switched to 3.3V, the progress bar for reading the ESP32 now almost always runs to 100.00% or 99.99%. But I was never able to read it and I always get Error: Timeout.

Any idea how to fix this?

I am using the new web interface of the develop docker image with SHA a5a6237.

Please use the legacy way as adviced in the wiki