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SEC_ERROR_UNKNOWN_ISSUER on school district website

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  • Last reply by FredMcD

roger.leonard1
roger.leonard1
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When attempting to access https://www.muasd.org which is a school district website I get the warning message with the reason stated above as SEC_ERROR_UNKNOWN_ISSUER. This happens on version 79 also on the enterprise quantum version as well as android firefox app. We took a brand new computer out of the box installed firefox while connected to a phone hotspot and received the same error. All other browsers work fine. Any help would be appreciated.

When attempting to access https://www.muasd.org which is a school district website I get the warning message with the reason stated above as SEC_ERROR_UNKNOWN_ISSUER. This happens on version 79 also on the enterprise quantum version as well as android firefox app. We took a brand new computer out of the box installed firefox while connected to a phone hotspot and received the same error. All other browsers work fine. Any help would be appreciated.

All Replies (2)

James
James
  • Moderator
  • Top 10 Contributor
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https://support.mozilla.org/en-US/kb/error-codes-secure-websites https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean

FredMcD
FredMcD
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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

What do the security warning codes mean