Strange 500 error on wiki page

[m0xf]

• Gitea version (or commit ref): 17655cd
• Git version:
• Operating system: Linux
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes
  • No
  • Not relevant
• Log gist:

Description

I see permanent error 500 on this link: https://try.gitea.io/m0xf/Kochen/wiki
It broke after upgrade.

Screenshots