Final Cut Pro X (10.4.2) crashes when I select apple devices or computer format to export

FCPX was working just fine with macOS Mojave, I upgrade to Catalina this morning and when ever I want to export any project from any library to a MP4 format (Apple devices or computer) the program closes. It's really weird because it doesn't display the export window, not export process, nothing! it even crashes if I go to settings>destinations>Apple devices->crash report. I doesn't happen with other export format (options). I didn't find much info on internet, some blame the .components from Quicktime, it didn't work for me; some others suggest erase the project, the library, the hole program. I haven't try to reinstall the program (I really don't want to). And in one post, someone say that may ocurre because a RAM problem, and ended to change it. I don't think is that, my MacBook is 2017 and has work really well.

Any help is well recibe, if I found a solution I will post it. The las resort is reinstall.