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Have uninstall and reinstalled and refreshed Firefox multiple times yet I still receive error about not being able to communicate with the server on all pages.

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I have uninstall and reinstalled and refreshed Firefox multiple times yet I still receive error about not being able to communicate with the server on all pages. Error message:

Unexpected response from server

Firefox doesn’t know how to communicate with the server.

   Check to make sure your system has the Personal Security Manager installed.
   This might be due to a non-standard configuration on the server.
I have uninstall and reinstalled and refreshed Firefox multiple times yet I still receive error about not being able to communicate with the server on all pages. Error message: Unexpected response from server Firefox doesn’t know how to communicate with the server. Check to make sure your system has the Personal Security Manager installed. This might be due to a non-standard configuration on the server.
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Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36 Edge/17.17134

More Information

FredMcD
  • Top 10 Contributor
4230 solutions 59026 answers
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 [https://support.mozilla.org/en-US/kb/websites-dont-load-troubleshoot-and-fix-errors?redirectlocale=en-US&redirectslug=Error+loading+web+sites Websites don't load - troubleshoot and fix error messages] http://kb.mozillazine.org/Error_loading_websites [https://support.mozilla.org/en-US/kb/what-does-your-connection-is-not-secure-mean What do the security warning codes mean]
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