Server Error - Cant save or archive a workflow

Hi everyone,
bit of a strange error and I’m not sure where to look.

Describe the problem/error/question

I have this one buggy / broken workflow that I can’t change, save, rename, deactivate or do anything else with. Even though it’s active, it does not run.

I have made a copy of it and it works perfectly.
But the broken original is still there.

What is the error message (if any)?

“The server had an error while processing your request. Sorry about that!” (see screenshot below)

Share the output returned by the last node

Information on your n8n setup

  • n8n version: community edition / newest version
  • Database (default: SQLite): Hostinger
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Hostinger
  • Operating system: Hostinger