Zscaler is one of the worst products I've had the displeasure to interact with. They implemented it at my old job and it said that my home Internet connection was insecure to connect to the VPN. Cyber Sec guys couldn't figure out the issue because the logs were SO helpful.
Took working with their support to find that it has somehow identified my nonstandard address spacing on my LAN to be insecure for some reason.
I kept my work laptop on a separate vlan for obvious reasons.
Yeah fortunately we didn't need to do any port forwarding or anything complex for networking for developing locally. It was definitely much easier for us. I don't like Apple, but I didn't mind my other old job that gave us MacBooks honestly.