Most problems with Mailsuite can be solved by uninstalling then reinstalling the Mailsuite extension on your browser. To do so:
1) In Chrome, click More (the three dots in the upper right corner of your screen).
2) Go to More tools Extensions.
3) Check to see if Mailsuite is still listed among the installed extensions and remove it by clicking on the remove button.
Then to reinstall Mailsuite:
1) Click here to install Mailsuite. Select 'Add to Chrome' followed by ‘Add extension’.
2) Log into the Gmail account you want to link with Mailsuite by clicking on 'Connect with Google'.
3) Lastly, go to Gmail to complete the installation process.