500 on org private to public, public to private and public to limited

[wULLSnpAXbWZGYDYyhWTKKspEQoaYxXyhoisqHf]

• Gitea version (or commit ref): Gitea version 1.14.0+dev-224-g586bfb9f3 built with GNU Make 4.3, go1.15.5 : bindata, sqlite, sqlite_unlock_notify
• Git version: git version 2.29.2.454.gaff20da3a2
• Operating system: Arch Linux
• Built from
  • source
• Run with
  • systemd
• Database:
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes

Description

After setting a private org to public I am met with a 500 (verified both locally and on try.gitea.io).
The same is true for public org set to private or public org set to limited.

https://try.gitea.io/nuoneplstest500
https://try.gitea.io/nuoneplspublic500

links to short videos of the issue
http://ix.io/2Eoa

[6543]

caused by #13475

error: e-mail invalid [email: ]

[wULLSnpAXbWZGYDYyhWTKKspEQoaYxXyhoisqHf]

caused by #13475

error: e-mail invalid [email: ]

right..org cannot have an email so that's a special case.
also, what are the allowed email addresses now as introduced by the subject PR?