V3 Gmail Notifier does not detect any new emails

[Sumurai8]

I have three accounts logged in into Google, and the V3 version of the Gmail Notifier does correctly detect that those email accounts are logged in. It does however incorrectly claim that there are no unread messages. Even after keeping it on for a while, it never shows that a new email has come in. The V2 version does show those emails just fine, and the RSS feed also shows those emails just fine. I was hoping that the V3 version would be less buggy when trying to click links inside of an email than V2 was, but if it doesn't show any emails it is completely useless to me.

Edit: V2 and V3 are both installed on Chrome 121.0.6167.185. There are a dozen or so extensions installed. Disabling them did not fix V3.