Every time I load my map I get these errors:

[WARNING] You have placed exactly 1 riser struct in this zone (start zone). This will cause a script_runtime error unless you have installed the UGX Modtools Patch or at least one additional riser struct for this zone.

And:

[WARNING] You have placed exactly 1 dog struct in this zone (start zone). This will cause a script_runtime error unless you have installed the UGX Modtools Patch or at least one additional riser struct for this zone.

I don't have either a riser struct or a dog struct anywhere on the map. Help?

If you have any zombie risers or dog spawners in your map, you must add atleast one more of each. It's telling you that you only have one riser placed in your zone, but if you need to, you can open _zombiemode_zone_manager.gsc and comment out the message at the bottom of the file