Symptoms
When attempting to load one or more lists or libraries, Sharegate displays the following error:
Feature '00000000-0000-0000-0000-000000000000' for list template '12345' is not installed in this farm. The operation could not be completed.
Error code
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Details
This error occurs because your source SharePoint site contains a list or library based on a no longer available template.
A typical scenario for this type of error is a list created with a template defined by a feature that has since been uninstalled.
This scenario makes the list invalid because the template no longer exists. When ShareGate's migration tool sends a request to SharePoint to load this list or library, SharePoint returns an error because it cannot find the list template.
Solution
You can re-install the feature in your SharePoint farm to make the list template available again. The feature should allow SharePoint to return the list correctly to the migration tool.
Alternatively, if you no longer use that list, you can delete it to avoid the error.
You can delete lists and libraries directly from the copy screen using Copy structure and content. For more info, see Delete content and delete content in bulk.