I'm having issues syncing with any of the sync providers on app version 5.4.1 and 5.5-BETA on Fedora 25. I am able to launch the browser and authenticate, but the desktop app says that it is unable to connect to the internet. I can try and curl or WGET the URL prefilled in the browser after authentication, and the connection is refused on this port. I have my firewall, iptables, and selinux disabled and it doesn't make a difference. I can provide any additional logs or information if needed, but I cannot find anything pertinent on my own.