XF 2.1 User is unable to post when logged in to Chrome


Hi, hoping I'm in the right place.
I have a user who cannot post, quote, or like posts when logged in on Chrome 92.0.4515.107 (Official Build) (64-bit). If she logs out, she cannot log back in. The error in both cases says "The requested user cannot be found."
This only happens on Chrome, she can use every other browser. However, it also persists on multiple devices, but only if she is logged in to Chrome itself. If she logs out of her Chrome account, she can use the forum normally. She has cleared browser cache, cookies, saved logins (only for the site itself,) and she has uninstalled and reinstalled Chrome.
I don't see any errors or messages pertaining to the user in the system logs. This is definitely a Chrome issue and I can see that there have been many issues with Chrome in the past, but nothing like this.
Any ideas?
Have her disable any browser extensions. Also disable any adblocker. You may have an addon installed that is interfering with her extension or vice versa.
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