Emails content is not being display if HubSpot extension is Installed
The new email content is not being displayed in outlook, but when we uninstall the HubSpot add-in, then it shows. even uninstalling and reinstallation of Outlook HubSpot Sales Add-in did not resolve the issue
I want to share this troubleshooting article that could help your issue.
If this does not help, I would recommend connecting with HubSpot Technical Support, as Support is included in your subscription and they will be able to provide real-time assistance for this matter, where you are able to share screenshots and further information about this.