Why am I getting a Liquid error in my theme's header section?

Topic summary

A Shopify store owner is encountering a Liquid error in their theme’s header section, specifically at line 1591 of header.liquid. The error message indicates an “include usage not allowed in this context” issue, accompanied by what appears to be reversed or garbled text referencing an image file path (possibly a screenshot). This type of error typically occurs when:

  • The {% include %} tag is being used incorrectly or in an unsupported location
  • Theme code contains malformed or corrupted syntax
  • There may be malicious code injection (the reversed text pattern is suspicious)

The user is seeking assistance to resolve this issue, which is preventing their header from rendering properly.

Summarized with AI on November 23. AI used: claude-sonnet-4-5-20250929.

Hello I need help if possible this writing appears in my theme

Liquid error (sections/header.liquid line 1591): include usage is not allowed in this context