Comment 2 for bug 1872476

I can reproduce the problem on a fresh new installed Ubuntu desktop 20.04 :

1) install package samba-common
   which is currently version 2:4.11.6+dfsg-0ubuntu1

2) add "client min protocol = NT1" to /etc/samba/smb.conf in [global] section
Note : required to access my NAS which only support SMB v1. It is included in my ISP internet box so I can not upgrade it.

3) launch "Files"
Note : Files version is currently 3.36.1.1-stable.

4.1) browse "Other Locations", Windows Network, WORKGROUP, FREEBOX_SERVER (which is my NAS)

4.2) connect as "Anonymous"

4.3) browse my NAS folder, all files are displayed as Folder, like on the attached screenshot "files_shown_as_folder.png".

4.4) I can not use any file on my NAS. When clicking on an item, a message box is displayed « This location could not be displayed. "France 3 Pays de Loire…" could not be found. Perhaps it has recently been deleted » as shown on the screenshot "can_not_open_file.png".

This was working correctly on Ubuntu 19.10. It looks like the upgrade to v4.11 of samba cause some problems with file browser accessing SMB v1 share.
I can reproduce the problem on LUbuntu 20.04 with either PCManFM-Qt and Dolhpin file browser.

With Ubuntu 20.04 "smbclient", I can correctly access the same share through SMB v1 and files are correctly displayed as files and usable, cf attachment "smbclient-works.txt"