Upgraded FM9 to FM12; now all Symbol font characters are appear as "?"

I'm using Frame 12.0.2.389.  I'm using the same font resources that worked for Frame 9, where I had no problems.

For example, I use Ohm for electrical resistance. Normally, I type a W, select it, and assign the Symbol font.  Now, it appears as "?".  All characters in the symbol font show the same result.

There are no missing font alerts when I open files.  The Font pod shows the Symbol font is installed/available.

What am I missing?

Thanks.