Google AdWords Conversion Tracking Fix

I'm experiencing an issue with my Google AdWords. My Magento eCommerce online store has stopped tracking online purchase conversions since March 20th. I'm seeking a skillful Google AdWords expert who has prior experience working with Magento to resolve the issue.

I am using the extensoin Mageplaza Google Tag Manager for Tracking in Magento 2. I need to find the reason why conversions are not tracked anymore.