Hey everyone, so I'm making a map and I wanted to add some flagpoles to the map, but each time I load the map, they doesn't appear.
Also, I wanted to add an helicopter that is hovering in the sky, but when I load the map the animation doesn't play

Here is what the compiler says :

** Executing...
** Command: "D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\bin\vbsp.exe"
** Parameters: -game "D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\tf" "D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\sourcesdk_content\tf\mapsrc\pass_cityofsixies_a1.vmf"

Valve Software - vbsp.exe (Nov 10 2016)
4 threads
materialPath: D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\tf\materials
Loading D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\sourcesdk_content\tf\mapsrc\pass_cityofsixies_a1.vmf
ConVarRef mat_reduceparticles doesn't point to an existing ConVar
Patching WVT material: maps/pass_cityofsixies_a1/nature/blenddirtgrass001a_wvt_patch
fixing up env_cubemap materials on brush sides...
ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0)
**** leaked ****
Entity func_door (-31104.00 -8356.00 -9727.99) leaked!
Processing areas...done (0)
Building Faces...done (0)
Chop Details...done (0)
Find Visible Detail Sides...
Merged 176 detail faces...done (0)
Merging details...done (0)
FixTjuncs...
PruneNodes...
WriteBSP...
done (0)
*** Error: Skybox vtf files for skybox/sky_tf2_04 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_tf2_04 to build the default cubemap!
*** Error: Skybox vtf files for skybox/sky_tf2_04 weren't compiled with the same size texture and/or same flags!
Can't load skybox file skybox/sky_tf2_04 to build the default cubemap!
Finding displacement neighbors...
Found a displacement edge abutting multiple other edges.
Finding lightmap sample positions...
Displacement Alpha : 0...1...2...3...4...5...6...7...8...9...10
Building Physics collision data...
WARNING: Map using power 4 displacements, terrain physics cannot be compressed, map will need additional memory and CPU.
done (1) (985895 bytes)
Error! To use model "models/props_frontline/flagpole_animated.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/props_frontline/flagpole_animated.mdl"!
Error! To use model "models/effects/bday_gib04.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/effects/bday_gib04.mdl"!
Error! To use model "models/player/items/taunts/engys_new_chair/engys_new_chair_articlulated.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/player/items/taunts/engys_new_chair/engys_new_chair_articlulated.mdl"!
Error! To use model "models/props_frontline/helicopter_windows.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/props_frontline/helicopter_windows.mdl"!
Error! To use model "models/props_frontline/helicopter.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/props_frontline/helicopter.mdl"!
Error! To use model "models/props_frontline/zeppelin.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/props_frontline/zeppelin.mdl"!
Error! To use model "models/thundermountain_fx/bridgedyncrates.mdl"
with prop_static, it must be compiled with $staticprop!
Error loading studio model "models/thundermountain_fx/bridgedyncrates.mdl"!
Placing detail props : 0...1...2...3...4...5...6...7...8...9...10
Compacting texture/material tables...
Reduced 476 texinfos to 215
Reduced 24 texdatas to 22 (606 bytes to 522)
Writing D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\sourcesdk_content\tf\mapsrc\pass_cityofsixies_a1.bsp
Wrote ZIP buffer, estimated size 691, actual size 611
4 seconds elapsed

** Executing...
** Command: Copy File
** Parameters: "D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\sourcesdk_content\tf\mapsrc\pass_cityofsixies_a1.bsp" "D:\Users\DefaultAppPool\AppData\SteamLibrary\steamapps\common\Team Fortress 2\tf\maps\pass_cityofsixies_a1.bsp"

It says that it must be compiled with $staticprop, but I don't know how to do this

I'd really like some help, this is pretty annoying :)
(Oh and if you could help me with the others errors, that'd be really cool, but I don't mind if you don't ;) )