@Starlynne_Start There is no manual migration. If your org is still on the Partner Dashboard, then you have not been migrated. Deployment is only needed to complete the process, post-migration.
The issue with customer account extensions sounds independent, I’d recommend a separate post.
Any updates? Soon been 3 days. I get that you’re working on it but some more frequent updates would be appreciated. 
Can we get some clarity on when this will be resolved? This is causing us serious issues as a business and holding up a very critical task that we have to complete.
I don’t upgrade the new Dev gen and everything works well 
I’m currently blocked due to this issue, is there a way to rollback the migration untill shopify fixes it ?
UPDATE: The issue has been resolved, apps with App Proxy are safe to deploy again on the Dev Platform.
Apologies for the delay on this, our team worked hard to ensure there would be no further store impact from this issue.
If you have a previous deploy that resulted in a 404 on dev/test stores, you may still need to remove and re-add the proxy.
Hi @prasanth_sk,
Did you try the suggested fix?
app_proxy config from your app.tomlshopify app deployshopify app deploy againYes, I tried this, but it didn’t help — I’m still facing the same issue.
We tried doing the suggested fix for our staging app and it kind of worked. If the theme extension had been installed on a theme previously though it still does not but if you install it on a new theme it works.
This is really not ideal for us as we need to test our release on our staging app before releasing to production. Rolling back to previous releases of the app also does not solve the issue which is a massive risk for us.
Could we get some guidance on what we should do here? Is shopify working on a fix behind the scenes? Is this only impacting development apps/ dev stores or will we see the same issue when we release a new version of our prod app?
Hi @Jack_Parnell –
This issue was not related to theme extensions, can you open a new forum thread describing what you are seeing in detail?
Thanks for the suggestion. I removed the app_proxy from my shopify.app.toml, deployed, then added it back and deployed again.
The proxy now shows up in the Partner Dashboard, but when I try calling /apps/my_app/getdroplist I still get a 404 Not Found response.
Hey @NickWesselman sorry my message want super clear, our issue is our theme extension is now unable to communicate through the App Proxy. All of the routes it attempts to call return a 404.
This seems like the same thing as this thread but happy to create another if needed?
@Jack_Parnell – Just PM’d you to get more info on your app.
Awesome thanks, have sent you over the details.
Hello, any updates on this?
I’m facing the same issue with my theme extension in development.
I’m getting a 404 when the request is trying to communicate through the App Proxy.
I already removed the proxy settings from the TOML, deployed, then added them back and deployed again, but this does not solve the problem.
Thanks in advance for your help
Hey @NickWesselman is there any update on this at all? We are blocked at the moment and would really appreciate the help.
Hello
I don’t know if you’re facing the same problem as I am, but in my case, I’m working with NGROK to communicate between the theme extension block and my custom API through an app proxy.
For now, selecting the “No, never” option when asked if you want to update the app URLs automatically allows me to work with app-proxy and NGROK in development.
I hope this helps.
Hi @Jack_Parnell – We are actively investigating.
If you are having proxy 404 issues and find yourself on this thread, please double check the configured proxy URL path in the store admin:
Settings > Apps and sales channels > {your app} > App proxy
More information on proxy URL customization:
If you are still having issues, please open a new thread.
