Business Application Studio Adaptation Project Error

Hello experts,

I have been trying to extend an existing app in BAS using "Adaptation Project" (like we used to achieve by "extension Project" in Web-IDE). However, during the configuration phase, I get the following error message:

error.png

Does anyone have an idea how I could fix this issue?

Thanks a lot in advance,

Oguzhan

P.S. I did double-check my credentials.