Indeed, that's expected. The test project you work on adds that dependency. We resolve that on each machine having WebUI Test Studio installed so unless you have that file at the specified location, the project could not be opened.
I suppose this brings a problem for your developers because you share the solution via source control, is that correct? I think the best solution for your case will be to exclude the project from that solution so that the devs won't get this warning anymore. You can add the test project in a separate solution instead.
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