Anyone could please help me to bypass this error.In my university the use fortigaurd.They block every dammn thing
What’s the error dude? Do share any image or SS with us here.
sorry for late reply dude, i left notification unchecked 
date --set 2020-02-19
date --set 18:00:00
Above command can be used to change date and time of parrot sec,
If this didn’t solve the issue, then update your source list
Source list path : /etc/apt/source.list
Then update your aptitude manager: apt-get update
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