PHP Fatal error: Uncaught Error: Cannot instantiate interface Plumrocket\…\Api\…Interface
This error means that Magento has outdated information about Dependency injection. In most cases, it is due to the cache.
Most likely, you are experiencing this fatal error after running the following command:
You need to clear the cache before running
bin/magento setup:upgrade. Please use the following command to clear the cache:
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