appSubscriptionCreate API gives internal server error on live stores

[abhishekscapic]

I am using appSubscriptionCreate mutation(  https://community.shopify.com/c/Shopify-APIs-SDKs/appSubscriptionCreate-on-a-live-application-Intern... ), with line item being of type - appRecurringPricingDetails. This works fine as long as test is set to false or null. 

On a dev store , turning test to true gives the desired result, where I am prompted to get a higher plan for the store. 
We went live based on this. Now, on a live store every attempt gives this error:

here's the query variable for more clarity:

Help would be appreciated.

[abhishekscapic · Accepted solution]

Update:

This happens when you are given access to your client's store and you try to add any kind of payment from you app. Managed stores don't have access to store's payment APIs. Only the store owner can initiate those. Nothing wrong with the query. 
It totally makes sense to put this kind of restriction.