Safaari 14.0 won't load Studios

SoundTrap studios no longer loads for me in the Safari browser. Fortunately I can use Chrome instead.  I have submitted this information as a Request to SoundTrap Support.

 

In Safari,  I can log in to SoundTrap. If I click on any of the [Studio] buttons, the  loading symbol "(--)" fills the screen. But then it hangs. 

 

This started last night, and Apple Support informs me that yesterday, Wed 09/16, was when Savari version 14 replaced version 13. So maybe the new Safari software has an incompatibility. 

 

This occurs on two iMacs one with operating system   macOS Mojave v.10.14.6 and the other with macOS Catalina v.10.15.6.