Help for own help is the best ...

I just changed the pins from 6,5,7 to 16,17 and 18. And it worked!
Thank you!

o.k. Decoding it to:

PC: 0x400d0d41: setup() at D:\Daten\Arduino\ESP32\TestLargeDigitDriver/TestLargeDigitDriver.ino line 44
EXCVADDR: 0x00000000

Decoding stack results
0x400d0d41: setup() at D:\Daten\Arduino\ESP32\TestLargeDigitDriver/TestLargeDigitDriver.ino line 44
0x4008618d: vPortTaskWrapper ...

O.k., how shall I do that?

I used the Arduino code for the Large digit driver from Sparkfun on an ESP-WROOM 32:

https://learn.sparkfun.com/tutorials/large-digit-driver-hookup-guide/all

I ended up with:
19:29:55.584 -> Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
19:29:55.677 -> Core 1 ...