Authentication error when select system in adaptation project configuration

[bber]

Hello, Experts

When I create the SAPUI5 Adaptation project, I got the Authentication error: Request failed with status code 401

1. I checked my SAP system setting, it's working fine for connection of SAP backend system.

2. I kept the versions of node.js and @SAP/generator-adaptation-project up to date.

3. I used the account from my colleague who has no issue to setup the system. And it still causes 401 issue.

Does anyone can help me with this issue?

[marvin_heibert]

Hello,

which authentication method are you using in order to connect to the SAP on-prem backend?
If its Principal Propagation please make sure your user fulfill the prerequisites which are configured in the transaction CERTRULE.
Username, email or Alias?

Br
Marvin 

[aymeric_perard · Accepted solution]

Hello,

I just posted an answer for the same issue here :
VS Code SAPUI5 Adaptation project error - Request ... - SAP Community

[bber · Accepted solution]

Thank you very much. This solution solved my problem.