Arduino on Linux/Manjaro --> ESP8266 Sketch Upload fails suddenly.... only Arduino-Boards work

Hello all,

I have just encountered criticism in the German section of the forum because I asked the same question in the German and English forums at the same time (and unfortunately used a different user here in the English forum for the post I had created for my son...in the german forum its the user "basementmedia").

Here is the same post in ther german forum:

I just wanted to point this out and hope that no one here is angry with me for it :wink:

If you have any tips on how I could solve my problem, I would be happy to hear from you.

Many greetings
Daniel