This can be a somewhat common occurrence.
To start, at the top of the page, under support, there are some articles to help.
Here is a link to one to start with.
https://flightsimulator.zendesk.com/hc/en-us/articles/360015760620-Download-Installation-guides
FYI, the moderators are a bit strict on posting in the Bugs & Issues section, as per the site rules, so you should search all the other sections of the forum that may pertain to your issue before you post here.
This section of the forum is for proven bugs that you can’t find a solution to elsewhere on the forum, and aren’t already in this section.
So, having said that, give the above a try, if this helps, please mark your thread as solved.
If it doesn’t, post back and let us know!