If that doesn’t help, I’d suggest resetting your data cache/connection:
In MSFS go to Settings > General > Data and delete rolling cache, then you need to initialise it again by switching it back on on the same page, clicking save, and waiting while it initialises. If you created any manual caches, do the same with those.
Then still on the same Settings > General > Data page turn off Online Functionality, then save, then back on, then save, then restart the sim and try again.