Norton products block download?

both mobile and pc, since installation, downloads from a specific app and/or a particular website will not work? specific instructions to “allow” them to download please. app setup (trusted) is easy in firewall section of pc, but it still doesnt download. so is it a website permission i need to find? the mobile security has barely no settings to adjust? just explain where and how to allow a website and/or app to be allowed “thru” your security products… on both… please?