Create empty SIP account make app crash

Describe your environment

• Device model: Samsung Galaxy Tab S5e SM-T720
• Android version: 11
• What build you are using: your own, commit 11584579

Steps to reproduce

• Can you reproduce the bug: at will
• Steps:
  1. Add account 2. Add SIP account 3. Add SIP account (again, with all fields empty) 4. OK
• Actual result: App loading forever, impossible to restart.
• Expected result: A new SIP account to be created.

Additional information

device-2023-03-20-155831