Zoho Gmail Extension Not Working Properly

Zoho Gmail Extension Not Working Properly

Hello. 
I am having an issue where the zoho extension added to my gmail isn't working properly.
First of all, I cannot open the notebook from the sidebar.

I did in the beginning, now I have no idea how to open the notebook. And added some things. Now it isn't working.

Ironically, I am able to open a an old Zoho Notebook using the same email. This account was made years ago. But it is not the same notebook that I have in my gmail account.

I tired uninstalling the extension and starting fresh, but it did not help.

Any ideas on this please?

Thank you.