Are you having trouble opening SAP Web IDE for Full-Stack Development? If you are seeing a 501/503 error, it may be that your principal propagation flag is not set properly.
To enable your principal propagation flag, in your SAP Cloud Platform Cockpit, click Security then Trust.
If the Principal Propagation flag is set to Default or Disabled, you will need to update it. Click Edit.
Change the value of Principal Propagation to Enabled and Save.
Now, go back to step 4 and try to open SAP Web IDE for Full-Stack Development again.