@JackS Thank you for responding. I'm able to scrobble on the desktop app. Last week, I was able to scrobble using the Internet Explorer web player, but I'm not able to today (by the way, the IE web player isn't updated, at least on my work PC). I was able to scrobble via the Chrome web player before the update.
Using the web player on a Chromebook, so evidently Chrome is the only option for me. As others have noted, the scrobbling feature has been removed from the web player and the Chrome extension doesn't pick up the tracks anymore.
I use spotify on mobile, scrobbles without a problem, and as a desktop app on a different device, scrobbles without problem - all on the same account as the webplayer, but scrobbling still does not work for the webplayer function.