Before filing a bug report, please try the latest version of Smb4K. Maybe your problem has already been fixed.
Follow these directions for your bug report:
Describe in detail what you did to receive the problem you are reporting.
Provide the version of Smb4K and KF5.
Mention your operating system (Linux®, FreeBSD, etc.) and the distribution that is running on your computer.
Include the full error message if an error dialog was displayed.
If you experienced a crash, attach a full backtrace. For this it is recommended that you (re-)compile Smb4K with debugging symbols. How this is done is mentioned in the Configuration, Compilation and Installation chapter in the appendix.
Add additional data, e.g. send a screen shot if you are reporting a GUI related problem.
The recommended method to report a bug is to use the dialog that opens when you click the → menu item. But you can also go directly to the KDE Bugtracking System and fill out the form.