Actually, it appears that Skyline does not include "OFX.Core.Contracts.dll" with its installer.
One thing that I believe would fix this problem for you would be to install the "Administrator Installer" instead of the regular Skyline installer.
The administrator installer can be installed here:
https://skyline.ms/wiki/home/software/Skyline/page.view?name=install-administator-64
Skyline stopped including "OFX.Core.Contracts.dll" in the regular installer starting in version 21.1. I am not sure why we have not had more complaints about this file being missing. It might be that there is some SCIEX software which you could install on your computer which would cause "OFX.Core.Contracts.dll" to be put in a place where Skyline could find it.
I will look into fixing this in an upcoming release of Skyline-Daily.
-- Nick