During updates made to version 6.47, our team removed a Visualforce Page and its associated Apex Controller from the package as it has not been in use for several years.
When deleting something from a packaging Org, the next version upgrade will delete that component from a Subscriber Org. However, due to a Salesforce restriction, Visualforce Pages cannot be automatically deleted; instead, they are made available for deletion by the Subscriber after the upgrade.
This restriction results in a dependency between the Visualforce Page and the deleted Apex Controller, preventing a successful upgrade from version 6.46 to 6.47.
The patch version of Email to Case Premium (6.46.2) reinstates the Visualforce Page and Apex Controller back into the package to overcome this Salesforce restriction. Once Subscribers have upgraded to version 6.46.2, they will be able to successfully upgrade to newer versions of Email to Case Premium in the future without interference. You can find more information on this Salesforce restriction here.
We will perform a push upgrading Email to Case Premium to all customers on the following schedule:
Sandbox: 1 AM EST Thursday, February 18th
Production: 1 AM EST Thursday, February 25th
You can perform the upgrade to 6.46.2 yourself by going to the Email to Case Premium AppExchange listing and clicking "Get It Now."