Its a common problem among Chromebook users, make sure your Anki display this version in “About anki”, if not then it is prob the latest deb version which was 2.1.15
Version 2.1.55 (01caec2a)
Python 3.9.15 Qt 6.3.2 PyQt 6.3.1 (For Qt6)
If you are on a debian based distro, the repo seems to be out of date as it only installed version 2.1.15 while 2.1.49 (latest is now 2.1.55) is available and solves this problem. You can download the updated version here and then you should be able to sync across devices and avoid this error.
An easy way to make sure your app will be up to date on Chromebooks is installing via flatpack (if it is compatible)
Flatpakâthe future of application distribution
Anki | Flathub
Possible solution: Anki on chromeboook