This error looks similar to this topic:
Please check with V7 compatibility pack.
If that doesn’t help, could you share the workflow in question? It looks like it’s trying to reference deprecated namespaces (UiPath.Library and UiPath.Activities). If Region and TypeInto are the only ones used, it should be possible to change it manually in the xaml by pointing it to new addresses, but if your other version is still V7 and compatibility pack doesn’t solve it, you might be out of luck on this one
Alternatively, if you can’t share the workflow itself, could you share just the lines from beginning to this one:
and at least one with a TypeInto activity.
It should be enough see what it’s trying to reference and thus what’s missing.