Why Gmail Account is Not Opening in Google Chrome
Google's site identifies three causes for the Gmail account not opening issue. It can be due to a conflict with a security app or other software on your system, a browser cache in need of clearing, and a temporary outage of the Gmail servers. If you are searching for the answer to why is my Gmail account not syncing, then extensions or add-ons can also cause this issue. Try to temporarily turn off these extensions and applications one by one, and then recheck Gmail to see if that resolves the problem. If the issue still persists, you can visit Google's Help Centre.
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