Run ExcelLink 3.7 in Mathematica 12?

Hi guys,

again another problem with ExcelLink for Mathematica.
When I run the first time a MMA macro in ExcelLink it works , but after seams that the link between Excel and MMA kernel is broken.
If I go in ExcelLink → option → Kernel and try to close the kernel i receive the error
Mathematica Link For Excel: Invalid Procedure Call Or Argument

My version of MMA is 12 and ExcelLink 3.7

Now on my Excel Sheet i have some RTD call to InteractiveBroker TWS platform and nothing more.

Is there something that I can do ?

Thanks