chrome refuses to open gmail

[ronbar59]

This problem did not happen until a month or two ago.
Since the problem started, when I try open Gmail from my Chrome browser a warning screen appears which reads "Not secure / Your connection is not private...".
Gmail does not open.
This does not happen when I use Firefox, but I would like to be able to use Chrome because it is much faster than Firefox.
Has anyone been able to correct this problem?

 

[COLGeek]

Is Chrome up to date? Have you tried clearing Chrome's temp files/history/cache and then trying Gmail again?

Is your system time (including timezone) correct?

 

[ronbar59]

Is Chrome up to date?
Yes
Have you tried clearing Chrome's temp files/history/cache and then trying Gmail again?
Yes

Is your system time (including timezone) correct?

Yes
But the problem remains.
These actions had no effect.

 

[COLGeek]

You've stepped through these steps?

https/support.google.com/mail/answer/7074871?hl=en

 

[ronbar59]

You wrote:
If Gmail is slow or isn't loading correctly, use the steps below to fix the problem.
Step 1: Check that you're using a browser that works with Gmail
[Gmail works in Firefox, doesn't work in Chrome.]
Step 2: Check your browser extensions or applications
[Chrome/Gmail won't open even with no extensions and running Incognito.]
Step 3: Clear your browser's cache & cookies
[Chrome/Gmail won't open even after having cleared its cache & cookies.]
Step 4: Check your Gmail labs
[Unable to open Gmail labs in Chrome using https/mail.google.com/?labs=0.]
[Able to open Gmail labs in Firefox using https/mail.google.com/?labs=0.]
[Turned off Gmail labs in Firefox.]
[Chrome/Gmail still won't open.]
The steps above didn't help.
If the problem still isn't fixed, check the G Suite Status Dashboard to see if there's a known issue happening on Gmail.
[Able to open G Suite Status Dashboard in Chrome.]
[G Suite Status Dashboard showed no problems with Gmail & others.]
[Chrome/Gmail still won't open.]
Thanks for trying to help me,
Ron

 

[COLGeek]

Have you tried uninstalling Chrome and reinstalling it?

 

[ronbar59]

Have you tried uninstalling Chrome and reinstalling it?

Yes- the problem continued after uninstall/reinstall.

 

[COLGeek]

What extensions do you have installed on Chrome (i.e., ad-blockers, tools, etc.)?

 

[ronbar59]

What extensions do you have installed on Chrome (i.e., ad-blockers, tools, etc.)?

None.

 

[COLGeek]

Can you access Gmail when using an incognito window?

 

[ronbar59]

Can you access Gmail when using an incognito window?

No- using an incognito window in Chrome, the result is exactly the same.