I upgraded to 0.21 on January 14. Tor only node. I dont get any inbound connection. Was running good on 0.20 with plenty of inbound connections.
Restarted today, catched an error message that could be the reason of this issue:
2021-02-13T15:08:33Z tor: Successfully connected!
2021-02-13T15:08:33Z tor: Connected to Tor version 0.3.2.10
2021-02-13T15:08:33Z tor: Supported authentication method: COOKIE
2021-02-13T15:08:33Z tor: Supported authentication method: HASHEDPASSWORD
2021-02-13T15:08:33Z tor: Supported authentication method: SAFECOOKIE
2021-02-13T15:08:33Z tor: Using HASHEDPASSWORD authentication
2021-02-13T15:08:33Z tor: Authentication successful
2021-02-13T15:08:33Z tor: Add onion failed; error code 513
What does that error code 513 mean ?
That Tor version is very old, I think it's from 2018. Can you try upgrading your Tor and try again?