cannot resolve destination host after code signed app for mac appstore

I made a Mac application by unity. This application access web-service by GET and POST method with unity www class. Web-service are run perfectly before the app code signed with the entitlement by the following command in terminal.

codesign -f --deep -s ‘3rd Party Mac Developer Application: DEVELOPER NAME’ --entitlements “GAMENAME.entitlements” “/AppPath/GAMENAME.app”

This code signed is required for upload Mac App Store.

After code sign , I cannot access web-service call by GET and POST method, which is give the www.error
“cannot resolve destination host”. Please help me. How I should solve this issue.

You need to add in GAMENAME.entitlements following key
com.apple.security.network.client
I think it will solve your problem.