Loading this assembly would produce a different grant set from other instances

Trying to load demo project files from the UiPath Academy Advanced Training 3, specifically the workflow for the random number.

However, despite acknowledging to have the project updated to my current version 2019.5.0 the error Loading this assembly would produce a different grant set from other instances. (Exception from HRESULT: 0x80131401) is displayed.
This happens with .xaml and json file respectively.

I see this was raised once before in Jan 2019 for a much earlier release but seems to either be unresolved or reoccurring.

Thoughts?

I’ve just had this error message crop up today, for no particular reason. I resolved it by simply shutting down all programs and restarting my machine. But that’s not really a great solution when the error has been officially recognised earlier by UiPath (Loading this assembly would produce a different grant set from other instances. (Exception from HRESULT: 0x80131401))

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