Hi Rafael,
There's a few things we can try:
Delete your scenery indexes (guide on where to find them here: How to fix missing scenery in Microsoft Flight Simulator – Aerosoft)
Clear your rolling cache (guide on how to do this here: All versions - How to delete the Rolling Cache and the Manual Cache – Microsoft Flight Simulator Support (zendesk.com) )
If neither of those have any effect, please try with a completely clean Community folder, containing only LEIB and aircraft you'd like to fly