"no DesignableClassName set" - What does this warning message mean?

Elements C#
1

I got this warning message and I lost my sleep over it. Any one shed some lights on it?

C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\RemObjects Software\Elements\RemObjects.Elements.Echoes.targets(70,3): warning : Resource file ‘ModuleManagerForm.resx’ depends on source file ‘ModuleManagerForm.cs’, but file has no DesignableClassName set.

2

Your resx file should have a DesignableClassName property set in the project file. Can you send me the project in question, and let me know how the resx file was created/added to it?