Hi Connor,
So I have been researching this issue extensively this early morning unfortunately, I had thought I had a possible solution however after re-reading your post I see you have already gone through the KB article as well as verified you had full access to every dictionary and folder in the Dynamics GP folder. The only additional thing I can think of is to try running Dynamics GP as an administrator ( Right click run as administrator). Without being able to stream into the environment it limits how much I can actually assist.
Another thing that you can do is open up a support case with us here at Microsoft Dynamics GP Support and we would be able to stream in and see what is actually going on.
Sorry, I don't have much more.
~Thomas Newcomb
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Microsoft Dynamics GP Support
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