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A user is getting this error everytime they try to make an edit on their detail page on a case record:

[LWC component's @wire target property or method threw an error during value provisioning. Original error: [Object EmailMessage is not supported in UI API]]

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This is a known issue:

Cannot save Case created via Email-to-case in Lightning if Case Source field is Editable

The workaround, currently, is to remove the Case Source field from the page layout for that user or make it read-only on the layout.

The error is due to the fact that Case Source polymorphic field has a value related to EmailMessage (and it's not enabled in UI-API which is used in editing the page).

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