Unable to use apt update or install due to certificate issues

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I just installed the new version of parrot os as full operating system. I’m unable to update and install packages using apt-get getting certificate errors. I tried every solution possible from online but still not working. I also changed the mirrors but the ones around my region show that not signed error. One other issue I have everytime i try to browse internet through firefox the connection is changed to http and I don’t know why? can any one please help me out.

  • Parrot version in use (if you are not aware of it, open terminal and type cat /etc/os-release | grep VERSION):
    5.0 LTS

  • Anonsurf running? (yes/no)
    Not running

  • Logs/Terminal output (use pastebin or similar services):

  • Screenshots:

Try this for the certificate errors. How to solve apt error server certificate verification failed

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