Powerpoint Design Ideas Not Working on Mac

[VARLI]

I have an Office 365 subscription and downloaded PowerPoint for Mac (Version 16.54) and there are no options to enable the Design Ideas function (on the ribbon bar or in the settings - see attached photos). I can only get it to work if I work in the web version of PowerPoint through my 365 account (see attached photo). Since I have a subscription, it should work in the desktop version, but it's not. I am connected to the internet. Can anyone help? I've tried everything and I can't get ahold of anyone at Microsoft. 

[#2]

I also have the same problem . the only reason that I bought this version is design ideas which is missing

[#3]

This is frustrating as the design function had been working up until two weeks ago, then all options disappeared... Why??