gitea: compare/create PR produces a 404

• Gitea version (or commit ref): 1.7.3
• Git version: 2.21.0
• Operating system: CentOS 7
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

Description

when trying to create a PR gitea shows a 404. Happens both on

• clicking on the “compare” button
• using the api https://myserver.example/api/v1/repos/myowner/myrepo/pulls

No relevant entries in the log files.

After downgrading to 1.7.2 everything works fine again.

Screenshots