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when i try to login gmail.com , getting a message -(Error code: sec_error_inadequate_key_usage)
mail.google.com uses an invalid security certificate. The certificate is not trusted because it was issued by an invalid CA certificate. (Error code: sec_error_inadequate_key_usage)
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This problem usually occurs when your system date and time isn't the same time of the loading server. So I would request you to check your time in your system i.e. Date and Time Settings.
In Case This Problem occurs again.
- Go to Tools --> Options
- Now click on the Advanced tab and then on Encryption tab
- Now click on the Certificates button
- Click on View Certificates
- Click Add Exceptions
- Write the address of the website
- Confirm the Certificate.
Warning the above method can cause Security risks.
In case you still have this problem, see this thread regarding how your Kaspersky software may be involved: Firefox says Gmail is an untrusted connection (sec_error_inadequate_key_usage). It does not give me an option to load the page anyway.