I cannot access my Hikvision system when I am away from home?

Hello I have a hikvistion cctv systems I dont no alot about them or the set up

I am having a problem with viewing my camera while I am away from the wifi zone so through 4g it will not let me view live view or play back I getting a connection error and when I try do on connect I getting video playback failed error code 380356 but on the app it say connection fails I using ivms -4500 that where its say con fail I hik connect say the play back code above

I...

I cannot access my Hikvision system when I am away from home?