We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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cant access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER

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for the last few days I have not been able to access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER as wikipedia is a very mainstream site I am surprised they would have this issue. It affects firefox, chrome and MS Edge

for the last few days I have not been able to access wikipedia.org due to security certificate error SEC_ERROR_UNKNOWN_ISSUER as wikipedia is a very mainstream site I am surprised they would have this issue. It affects firefox, chrome and MS Edge
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Svi odgovori (2)

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Since all of your browsers are affected, it may be some external factor such as:

  • security software that filters your web connections
  • "parental control" software that filters your web connections
  • firewall software
  • ISP settings error
  • proxy server settings error
  • private VPN/Hola/TOR settings error