Unable to add app block to template customers/order using deep link

Topic summary

A developer is encountering an error when attempting to add an app block to the classic customer account template (customers/order) using a deep link. The error message states: “xxxxx not added. There is a problem with the app block. Contact the app developer.”

Technical Details:

  • The deep link follows this structure: https://admin.shopify.com/store/xxxxx/themes/current/editor?template=customers/order&addAppBlockId=xxxxx/xxxxx&target=newAppsSection
  • An error screenshot has been provided showing the issue

Current Status:

  • The issue remains unresolved
  • The developer is seeking assistance to fix this problem
  • No responses or solutions have been posted yet
Summarized with AI on November 6. AI used: claude-sonnet-4-5-20250929.

When I use a deep link to add an app block to the classic account template customers/order, an error occurs: “xxxxx not added. There is a problem with the app block. Contact the app developer.” As shown in the image below:

error.png

And my deep link looks like this:
https://admin.shopify.com/store/xxxxx/themes/current/editor?template=customers/order&addAppBlockId=xxxxx/xxxxx&target=newAppsSection

Please help me resolve this issue. Thank you. :folded_hands: