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When it comes to this error this is usually caused because the meeting was embedded onto canvas rather than linked properly, so there should be a link at the top of the screen where you can access the meeting that says "Video meeting Link ->" and if you click that at the top it will ask for you to hit "Allow" on the microphone and web cam and should let you into the meeting. If you still are having issues with this please contact tech support at 515-965-7300.