Hi Elyse,
Ive managed to make it work. What I did was the following.
- opend wordpress in firefox private window
- then the plugin page was totaly blank (so different from the other experience I had)
- then i found in developer concsole the link from hubspot that it supposed to load
- I copied that into a new window. and their I could login
(not sure if I remember correctly, but my profile was allready there)
- Then followed the onboarding and went back to the other page (wordpress)
- And there the plugin showed all the options in the left menu, but still white screen
- Then went back to my normal browser and there everything worekd.
Hope it helps for further issues.