I'm running into a huge problem, that whenever an application is trying to open the file system, such as chrome trying to prompt me to specify a path to download things, it makes ubuntu crash and gets me back to the user/password screen and everything that was open gets closed. There are also other applications that make it crash the same way but not so noticeable, but very insignificantly, I think that only one app makes it crash like that. But every time that an application tries to get to the file system, it crashes.
P.S.: Nautilus opens regularly, I have no problem with exploring my file system.
I'm using Ubuntu 18.04