I don't think the JSON VBO has anything to do with the original error. The only time I have seen the original error you described is when that object literally doesn't exist in the Blue Prism environment or if for some reason it is inaccessible to the process (maybe if it's hidden due to folder permissions? I dunno).
Anyway, if you verify that you have the Webservices - OAuth 2.0 object and the JSON VBO in the environment, you still get that error?
Edit: Also, as a general rule of thumb, the easiest way to troubleshoot problems involving objects is to step into it from a process. Just keep clicking step (step in) and watch the values in the data items and such until you run into the error. The problem will usually be pretty obvious from that view.
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Dave Morris
3Ci @ Southern Company
Atlanta, GA
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Dave Morris, 3Ci at Southern Company