## How it works

Most integration failures come from an incompatible plugin release, a blocked webhook, a missing connector method or an incorrect shop/environment.

## Implementation

Compare the approved plugin version with the deployed API, especially Cancel URL support. Check the webhook's delivery result and the order's payment ID. Verify enabled payment rows, connector credentials and supported currency. Disable caching on checkout and callback routes. HPOS and block-checkout behavior should be checked against the installed package. Investigate amount mismatches before releasing an on-hold order.