Why does my new store's theme editing page fail to load?

Topic summary

A user with a brand new Shopify store encounters an error when attempting to customize their theme. The theme editor fails to load, displaying a “Failed to load the page” message citing either URL redirection issues or page loading errors.

Key Details:

  • No apps installed or prior modifications made to the store
  • Error occurs consistently when accessing theme customization
  • Screenshot provided shows the specific error message in the theme editor

Current Status:

  • Another user requested a screenshot for clarification (which was provided)
  • A third user reports experiencing the identical issue
  • No solution has been identified yet — the discussion remains open with unanswered questions about the root cause and fix
Summarized with AI on November 1. AI used: claude-sonnet-4-5-20250929.

Hi!

How did you manage to solve this problem? I have the same problem now. I can’t find a solution anywhere.