Hi @BroughtSinger97…
I have moved this topic out of bug reports as there are usually steps we can take as end users to correct this issue.
There is a very helpful zendesk article that runs through the check list of things to try:
https://flightsimulator.zendesk.com/hc/en-us/articles/360015985699--Please-insert-the-Microsoft-Flight-Simulator-Game-Disc-Error-message
In my own case, when I had this issue, syncing my computer time corrected the issue for me.
I hope one of the steps in the article corrects the problem you are having.
Please post back if it doesn’t!