Hi all,
This seems to be the answer from Grammarly:
’
Kasey (Grammarly Support)
Feb 2, 5:46 AM PST
Hi L,
Thank you for contacting Grammarly! Let me look into this for you.
It appears that Hubspot uses iFrame for its text areas. Unfortunately, iFrame is not supported by Grammarly at this time.
The good news is that you can check your texts in the Grammarly Editor at [u]Grammarly: Free AI Writing Assistance, as well as in the native (desktop) app. Also, if you’re a Windows user, you can download Grammarly for Microsoft Office to check your texts from within MS Word and Outlook.
I hope this helps, but please feel free to contact me with any additional questions or comments. We apologize for any inconvenience.’