AE CC2018 - Import PremierePro project, "zero denominator converting ratio denominators"

Hi all,

Running AE CC2018 (15.0.0 Build 180) on Windows 10.   Attempting to import a Premiere Pro CC2018 project file.  Whether I select All Layers or only individual layers, I get the following errors and the project doesn't load:

"After Effects error: zero denominator converting ratio denominators" (17::19)

"After Effects: AEGP Plugin Premiere Pro Import: Unknown error." ((5027::12)

Searching Google for the zero denominator error gives me some older threads here which were never resolved.   Long ago I encountered a different PPro Import error and the fix was to save the project out of the latest Premiere Pro, so I've made sure to do that and to update both apps to the latest builds.

Any ideas how I can solve this?   The project involves a large number of cut points to which I need to apply an AE effect, so having the cutpoints all visible in the timeline is going to be a huge help.  Otherwise I'd just render the PPRo out and use the resulting image sequence.

Thanks much,

     Steve