Namespace or type specified in the Imports ... doesn't contain any public member or cannot be found

Im migrating a document understanding project from legacy framework to modern framework (all packages are the latest)

There are no validation errors, but when i try to run my project it gives me this error…

Unexpected error has occurred during the library compilation process:
The assembly compilation returned the following errors:
 * Namespace or type specified in the Imports 'System.Activities.DynamicUpdate' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.

 * Namespace or type specified in the Imports 'UiPath.IntelligentOCR.Activities.Actions.Model' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.

 * Type 'uipath.IntelligentOCR.Activities.Actions.Model.DocumentClassificationActionData' is not defined.
 * Value of type 'List(Of uipath.IntelligentOCR.Activities.Actions.Model.DocumentClassificationActionData)' cannot be converted to 'List(Of DocumentClassificationActionData)'.
 * Type 'uipath.IntelligentOCR.Activities.Actions.Model.DocumentClassificationActionData' is not defined.
 * Value of type 'List(Of uipath.IntelligentOCR.Activities.Actions.Model.DocumentClassificationActionData)' cannot be converted to 'List(Of DocumentClassificationActionData)'

In studio there are no validation errors whatsoever, and the type stated in the error above clearly exists

.

Please any solution to this problem?

i htink i just created new project and it was ok @zeezah_Akinola

Okay, thanks.

So, did you find the root cause?
Or just rebuild the whole project in a new file?

rebuild, didnt find root cause