Trying to bleed disc brakes & front driver side hose keeps leaking at caliper fitting

[HeavyHauler]

I installed all brand new 4 wheel disc brake system on my 1968 Chevy C10. Today I tried to bleed the system but fluid started leaking out of the front driver side caliper hose fitting. I tightened the hose caliper bolt and it still leaked. I changed both copper fittings on it and it still leaked. Not sure what to do in order to stop it from leaking. I then looked at the front passenger caliper and it is also leaking so I think it will have the same issue.

Anybody have any tips on what it might be?