Unable to see activated fonts in Premier Pro 2020

I was encountering the same issue. I had added some effects with captions that had an Adobe font. The error kept popping up when the animation would play. The preview was black so I could not visually verify the font. So I found the effect again and looked at the info listed and saw the font name. Then, out of curiosity I looked at my system fonts on Windows and compared it to CC fonts and the names were slightly different. In the system font, the title of the font/font name had a space, the system font, so I deleted it. I must have installed it at some point.

Low and behold it worked.
I just wanted to put this reply in because there was no way I was going to get rid of thousands of fonts. 
My suggestion if you are experiencing this issue, look at the fonts you are using in your project and see if there may be a discrepency in system vs. Adobe CC fonts.
I certainly hope this helps someone because I was about to go bald from pulling my hair out!
PEACE!

Hi Ann! I have the same Windows version of emmag75192746:
Microsoft Windows 10 Home
Version 10.0.18362 Build 18362

Processor Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz, 1801 Mhz, 4 Core(s), 8 Logical Processor(s)

16 GB RAM

And I'm trying the 7 days free tryal of Adobe Premiere since yesterday. Today I discover the following issue: I have no active fonts under the top rigth "f" in the CC Desktop. The only I see is a "fill this space with fonts" message.

I've tryed your suggestion but was unsuccessfull. I'm starting to going crazy XO. What can I do? Thank you in advance.

UPDATE: Additioning titles from Essential Graphics Window  resulted in the activation of the required font. But in the begining I only get a warning for activating the font sync, wich was already activated. 

Hi, thanks for that. I've just tried and it didn't work for me. ☹

Thanks for the try though!