Hey everyone I have a problem when starting a cutsom zombies map,when I start one it says ''Server script compile error ,Could not find script'maps/_zombiemode_weapons_sumpf' how can I fix this problem ?

That means you are missing    _zombiemode_weapons_sumpf.gsc, so put that gsc file in your mapname/maps folder. If you don't have that gsc then you should remove it from your mapname.gsc probably where it's called around zombiemode main. If not then you are referencing it in some other script and it can't find it because its not in your mapname/maps folder lol. I mean generally in my experience any time you get that "Could not find script" you are probaby forgetting  to put the script in mapname/maps folder, or in one of your scripts you are doing #include _zombiemode_weapons_sumpf and it's missing from the maps folder etc. Just check stuff like that if you haven't already figured it out.