The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem."

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem."

After I boot my computer, I can access any of the sites I usually use, but only once. If I then close the site and attempt to open it again (or to open any of the other affected sites), I get the following message: " Secure Connection Failed An error occurred during a connection to phoenixcommons.cohousing.site. PR_END_OF_FILE_ERROR Error code: PR_END_OF_FILE_ERROR The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem." The site shown in the error message above is the one I most ofen use, but other very common sites (e.g. Google.com) exhibit the same problem: " Secure Connection Failed An error occurred during a connection to www.google.com. PR_END_OF_FILE_ERROR Error code: PR_END_OF_FILE_ERROR The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem." Yeah, right. I'm supposed to contact Alphabet and inform of the problem? In contrast, some sites (e.g. The New York Times, The Washington Post) are not affected. I can paste affected URLs into another browser (I used Brave) and access them with no problems.