MSForms.CommandButton = User-defined Type not defined

I have created a new workbook and I keep getting a compile error "User-defined Type not defined" on the line:

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I have tried googling the net and the solutions I found ("Trust access to the VBA project object model", enable VBIDE tool reference library) have no effect.

Can anyone help?

Solved. I provide the solution for anyone else who runs into this.

One solution I found on the net stated "to enable tool reference library Microsoft Forms 2.0". However I opened my tool references and the library didn't exist! So I tried adding a new form to the VBA project. This caused the Microsoft Forms 2.0 library to appear in the new workbooks tool reference library.

Now that the library was enabled in the workbook, the compile error disappeared.

I had a similar problem.
Solution 1: I declared "Dim Btn as Object", not as MSForms.CommandButton.
Solution 2: Move the line "Dim Btn as MSForms.CommandButton" after the UserForm variable has been declared AND set!
Both solutions worked for me.