After I solved this problem with the answer there, another problem is present on Ubuntu Mate running on Odroid.
Every time I try to open any folder on Desktop (the ones I just created or home folder), Ubuntu seems to open it but before the window is completely loaded, it logs me out and when I re-log in all the open windows are closed.
There is no problem if I navigate through the folders with the Terminal. I am the odroid user (echo $USER) and also the owner of the folders.
Also there is no problem if from the Desktop I right-click on the folder and then select Open With Files. And there is no problem neither if I open Files then select Desktop and the double-click on the same folder.
Does anyone have any idea of what is happening?