[dolphin] [Bug 421624] New: Wrong and misleading message when navigating to samba shares list in Dolphin

[Vladimir Yerilov]

https://bugs.kde.org/show_bug.cgi?id=421624

            Bug ID: 421624
           Summary: Wrong and misleading message when navigating to samba
                    shares list in Dolphin
           Product: dolphin
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: openmindead at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
Irrelevant error when trying to navigate to smb shares list: "Unable to find
any workgroups in your local network. This might be caused by an enabled
firewall."

STEPS TO REPRODUCE
1. Have SMB v1 or v2 only share.
2. Navigate to Network -> Shared Folders (SMB)
3. ???
4. The above quoted misleading message.

OBSERVED RESULT
Nothing, just an error. In terminal I see the following (Dolphin 20.04.0):
```
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
```
In case of Dolphin 20.07.70 I see this:
```
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
kf5.kio.core: Invalid URL: QUrl("")
QFSFileEngine::open: No file name specified
```
One more error.

EXPECTED RESULT
List of shares in the local network.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro Linux 20.0, kernel 5.7-git
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2

ADDITIONAL INFORMATION
This message doesn't appear if entering the full address like
"smb://192.168.1.1". Also shares on that particular device are listed normally
when entering full address.

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