That's not a nautilus bug, also it's discussed there https://askubuntu.com/questions/1229929/cant-acces-nas-anymore-after- upgrading-to-20-04 and mentioned on https://wiki.ubuntu.com/FocalFossa/ReleaseNotes#Samba_4.11
** Changed in: nautilus (Ubuntu) Importance: Undecided => Low ** Changed in: nautilus (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1892897 Title: Cannot access a Samba file share anymore due to "Failed to retrieve file list from server" Status in nautilus package in Ubuntu: Invalid Bug description: This is a regression bug as I have no problems with another laptop running Ubuntu 18.04 LTS. Trying to access Samba file share on my Synology Diskstation (smb://diskstation.local) gives me just "Failed to retrieve file list from server: Software caused connection abort". See the attached screenshot of the problem. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: nautilus 1:3.36.3-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27.6 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue Aug 25 20:34:44 2020 InstallationDate: Installed on 2016-09-13 (1442 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) SourcePackage: nautilus UpgradeStatus: Upgraded to focal on 2020-05-19 (98 days ago) usr_lib_nautilus: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1892897/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp