troubles at 48kHz in PT 12.6.1 with Focusrite Scarlett

[banjo71]

I used to own PT 8 on Windows 7, using the Fast Track Pro. I used to have sessions in both 44.1 and 48kHz. I upgraded to PT 12.6.1 on Win 10 and got a Focusrite Scarlett 2i2 2nd generation audio interface. The Focusrite Scarlett software has a control panel for switching between 44.1, 48, ... up to 192kHz.

I can successfully open 44.1 and 96kHz sessions by switching to the appropriate frequency, but everytime I want to go to 48kHz, it won't play. I can open the session but it won't play. It will return an error,

"Pro Tools could not initialize the Focusrite USB ASIO. Please make sure that the device has been configured correctly."

I have to save and then after saving the session it freezes. I have to "x" out of the program.

The interface will work at all frequencies on other DAWs. And, I already made a ticket with Focusrite and they feel like it's not on their end.

Any ideas why it won't work?