Hi @hadeerismail22,
Circling back on your original question - while I think it should be fine to just enable the --no-check-certificate flag on your end, this may be slightly unrelated (depending on the OS you are attempting to run QIIME 2 on).
If you are using Windows, I'd check out this related forum post regarding the command line utility that we recommend, if you aren't already using WSL.
If this doesn't resolve the issue, and enabling the --no-check-certificate flag doesn't resolve it either, please let us know and we can dig a bit deeper!
Cheers 