SINCE PEOPLE KEEPS POSTING THE SAME THING HERE IS ONE SOLUTION:

1. Zombies won't move until I walk near them.
Answer: AI NODE IS MISSING OR OUTDATED ON THE MAP YOU ARE PLAYING, ALSO MAKE SURE ITS SUPPORTED BY ZMOD

From ShadowTehAmazing: Open server menu and clean up the auto spawned zombies and wait them to respawn.

2. Why can't I edit Zmod? It's all in 1 line.
Answer: YOU ARE NOT ALLOWED TO MODIFY/EDIT AND REDISTRIBUTE ZMOD!
Please respect Nordahl's hard work! He spends a lot of time day by day just to improve zmod!

3. Only zombies spawns on the map! (and furniture) There are no items!
Answer: Make sure you disable/don't have any conflicting addons! Examples: WAC,Insugency SWEPS,ULX and etc...

4. Pills omg omg there are no pills you are done once you get infected11!!1!
Answer: Pill spawn rate depends on the map, like gm_atomic it's post apocalypse map so pills are rare. Other maps has decent amount of pills so don't worry!

5. The key settings like F1,C and zoom key doesn't work because I replaced them!
Answer: Set the zoom key and context menu in keyboard options, I will post the bindngs for F1 ~ 4 menu later.

6. Sometimes my hands and weapon disappear!
ANSWER: Open console, type record 1 and get back to game, once you see your arms and stuff open console and type stop.

7. I see yellow and gray bar on top and bottom of my screen!
ANSWER: It's suppose to be motion blur, type mat_dxlevel 90 in console or if you don't your game to lag then disable motion blur in F1 menu.

8. When I play singleplayer, I lag a lot!
ANSWER: Press F1 and decrease the zombie spawn rate in server option.

9.I found bug,glitch or lua error whatever, where do I report it?
ANSWER: Go to Bug report discussion and post it. Make sure when you are reporting lua error post the error from console too!
Please DON'T use comment section or make a discussion.

10.I am trying to set up a Zmod server.
Answer: Make sure you get the server files!

11.Zombies won't die when I shoot them a lot in the head!1!
Answer: Hitboxes... It's common problem in Source Engine.

12.Is there any requirements for Zmod?
Answer: http://steamcommunity.com/sharedfiles/filedetails/?id=109691377
Maps that Zmod supports

http://steamcommunity.com/sharedfiles/filedetails/?id=159455773
http://steamcommunity.com/sharedfiles/filedetails/?id=128002457
http://steamcommunity.com/sharedfiles/filedetails/?id=148447462
http://steamcommunity.com/sharedfiles/filedetails/?id=105984257
http://steamcommunity.com/sharedfiles/filedetails/?id=151544081
http://steamcommunity.com/sharedfiles/filedetails/?id=105982362
gm_flatgrass

gm_construct

You don't need all maps to play, just get the map that you need.
You can find all of it (hopefully) on Workshop.

13.Is there any Steam Group for Zmod?
Yes, it's open to public and you are free to join and support!
Zmod offical

14.Next update???!??//11/?
Answer: Just wait...
---------------------

Please don't use this discussion as bug report, for bug report use other discussion.
You can post your own problem and solution here too, I will add them as soon as I see it!
You are allowed to correct the answers just post the correct one and I will change it!