Shopify App Issue

Shopify Apps

Topic summary

A new Shopify developer encountered a “refused to connect” error when attempting to preview their first app locally.

Steps taken:

  • Created app using shopify app init via Shopify CLI
  • Successfully installed app on admin
  • Ran app locally with shopify app dev
  • Pressed ‘p’ to open preview link
  • Received connection error

Current status:

  • User attempted to attach a screenshot for reference but it appears missing
  • Another community member requested clarification on the steps and shared a potentially relevant thread discussing similar “refused to connect” errors
  • Issue remains unresolved and awaiting further troubleshooting
Summarized with AI on November 4. AI used: claude-sonnet-4-5-20250929.
1

I am new to Shopify. I created a first app using Shopify CLI and installed it on admin successfully. I referred to this. https://shopify.dev/docs/apps/build/build?framework=remix When I open preview link, I got an error of “refused to connect”. For a reference, I attached a screenshot. Please help me to fix this.

2

Hi @GoldenChicken , the screenshot seems to be missing. Can you explain the steps you followed? I found a similar thread here, maybe that helps you out.

3

Here are my steps.
I created a shopify app using “shopify app init” from shopify cli.

I run this app locally using “shopify app dev” and clicked “p” to open preview link.

I got above message.