On Google, three things could be causing your Gmail account not to open. These conflict with other software on your system, a cache in your browser that has to be cleared, and a temporary outage of the Gmail servers. So, if you’re Gmail not opening in your Chrome browser, then extensions or add-ons can also cause this issue. Try to temporarily turn off these extensions and applications one by one, then recheck Gmail to see if that resolves the problem. Further, check the internet connection on the system. Also, examine if Windows Defender is blocking it. If so, then turn it off. Now, try to load Gmail again on your device.