Hey @Vitor_dos_Santos,
What Insync version are you running? Have you downloaded our latest 1.5 build for Fedora 21? 
You can download it here! Let me know if it works for you.
Hey @Vitor_dos_Santos,
What Insync version are you running? Have you downloaded our latest 1.5 build for Fedora 21? You can download it here! Let me know if it works for you.