Some of our team have gotten this error and its unclear how to resolve. In addition the in5 menu dropdown in the top bar only displays Interactive Widgets. Removing the in5 and Ajar production folders from the InDesign folder per the uninstallation instructions does not resolve the issue and the top bar menu remains unchanged, displaying only the Interactive Widgets option in the dropdown.
So far our solution has been to uninstall and reinstall InDesign.
