I experienced the same thing when I tried to update from 5.9.9.87 to 5.9.9.88. After several retries it finally updated and has been fine since. Anyway, if you can't get it to update you might want to just download the update and do a manual install.Currently on 5.9.9.87
Getting window showing that I can "Install latest update available 5.9.9.90 (10/5/2025)"
Selecting basically shuts down Blue Iris, but does not update.
I can manually restart, which then again lets me know an update is available.
It sounds like @Arjun has hacked ipcamtalk's server.When trying to download 64-bit 5.9.9.90, got hit with a few pop-up porn images, before taking over the browser. Beware.