Error:
Unhandled Exception Method not found:'VoidSystem.Windows.forms.ToolItem.set_Backgroundimagelayout(System.Windows.form.imagelayout)'
Cause of the issue:
This error typically occurs when trying to launch Webgility Desktop. This error indicates that Webgility Desktop needs an update.
Steps to fix:
Take a latest backup of Webgility Desktop database and then upgrade it to the latest version.
Follow the steps in this helpful article on How to Update Your Webgility Desktop Software
Once done then try to login again.
If the problem persists, contact Webgility Support for further assistance.