I tried both CamStudio and OBS Studio on my HP laptop.
Neither worked with audio. I got errors trying to access audio via speakers.
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A bug should be reproducible, and not related to a certain, product/brand.
Try making tests on other computers (same model if possible).
Illusions are an infinite paradise.
In general, to help troubleshoot it really helps sharing what the exact error message is (either through screenshots or quoting the exact error message, especially if there is some code or error code in the error message).
Also what are the steps that you took that triggered the error.