Cannot create an account

[kuba-orlik]

Describe the bug

After a fresh installation, I can't create a new user. Logs show an error:

 Exception while invoking method 'ATCreateUserServer' Error [ERR_TLS_CERT_ALTNAME_INVALID] [ERR_TLS_CERT_ALTNAME_INVALID]: Hostname/IP does not match certificate's altnames: Host: localhost. is not in the cert's altnames: DNS:yuno.internet-czas-dzialac.pl
     at Object.checkServerIdentity (tls.js:287:12)
     at TLSSocket.onConnectSecure (_tls_wrap.js:1512:27)
     at TLSSocket.emit (events.js:314:20)
     at TLSSocket.EventEmitter.emit (domain.js:483:12)
     at TLSSocket._finishInit (_tls_wrap.js:937:8)
     at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:711:12)

Context

• Hardware: VPS bought online
• YunoHost version: 4.2.8.3
• I have access to my server: *Through SSH *
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no

Steps to reproduce

1. Install the app
2. Open wekan in the browser
3. Choose "register"
4. Enter username, email and password
5. An error appears in the browser. Logs of the service are as above
6. The account is created, but no email is sent

[kuba-orlik]

A fix seems to be changing the MAIL_URL variable in /var/www/wekan/.env so it references the main domain instead of localhost