[CHROMIUM] Troubleshooting error "Your profile could not be opened correctly"

If you have a Google account

Stop chromium, open a terminal and delete the user profile directory :

$ rm -rf ~/.config/chromium/Default

Default is the name of the profile, so it may be different for you.

Start chromium, and log into your Google account to sync your profile again

If you don't have a Google account :

Stop chromium, open a terminal and backup the profile :

$ mv ~/.config/chromium/Default ~/.config/chromium/Backup

Start chromium, Then close it, delete the user profile directory, then replace it with your backup :

$ rm -rf ~/.config/chromium/Default && \
> cp -R ~/.config/chromium/Backup ~/.config/chromium/Default

Then when you open chromium again, your preferences should be back.