For most problems that you'll experience with a web browser, clearing out your cookies and cache will resolve it. Be mindful that there will generally be a "time range" that you can select from and the best way to know that your browser is going to be working as it should is if you set that range to "all time". There's not a great way to determine what bit of data is obstructing your task on your browser, as there are so many that will be interacting with each other, so just getting rid of them all is the best idea!
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