Start_

1. Git your src folder + Commit files (No need to push to public).
2. Replace your src folder with latest rAthena src folder.
3. Revert your lost source edition (If need).
4. Clean and build.

- Id: 504 AegisName: White_Potion Name: White Potion Type: Delayconsume Buy: 1200 Weight: 150 Script: | percentheal 20,0; If still not working
- Id: 504 AegisName: White_Potion Name: White Potion Type: Delayconsume Flags: NoConsume: true Buy: 1200 Weight: 150 Script: | percentheal 20,0;  

Error log already told you the problem.
Try look at top of document you will see how many column required and what it used.

Adjust those cards item script
if(getequipid(7) != val_arm_id){ // card bonus here }  

Added permanent skill (push cart). That's it.

The word your show is located at data/msgstringtable.txt try search those words.

NEMO already had option for it.
Please try read description and tick any option that should affect and see how it goes.

Store amount by 'countitem(nnn)'
and use 'delitem nnn,amount;'
then multiply reward by 'reward * amount'

Try disable show exp number choices when patching NEMO.

Oh I see you new mob is not follow rAthena indent. That is the problem.
 
rAthena indent

\rathena\src\map\itemdb.hpp
Line 901
 
and
\rathena\src\map\mob.cpp
Line 6121 and 6123
 
Edit MAX_SEARCH to 30
 

db > re > mob skill db
Remove TELEPORT from all MVP.

setarray .@indices[1], EQI_ACC_L,EQI_ACC_R,EQI_SHOES,EQI_GARMENT,EQI_HEAD_LOW,EQI_HEAD_MID,EQI_HEAD_TOP,EQI_ARMOR,EQI_HAND_L,EQI_HAND_R,EQI_COSTUME_HEAD_TOP,EQI_COSTUME_HEAD_MID,EQI_COSTUME_HEAD_LOW,EQI_COSTUME_GARMENT,EQI_SHADOW_ARMOR,EQI_SHADOW_WEAPON,EQI_SHADOW_SHIELD,EQI_SHADOW_SHOES,EQI_SHADOW_ACC_R,EQI_SHADOW_ACC_L; for(.@i = 1; .@i<getarraysize(.@indices); ++.@i) { if(getequipisequiped(.@indices[.@i])) { .@menu$ = .@menu$ + F_getpositionname(.@indices[.@i]) + "-[" + getequipname(.@indices[.@i]) + "]"; .@equipped = 1; } .@menu$ = .@menu$ + ":"; } .@part = .@indices[select(.@menu$)]; setrandomoption(.@part,0,rand(1,220),rand(1,2),0); setrandomoption(.@part,1,rand(1,220),rand(1,2),0); setrandomoption(.@part,2,rand(1,220),rand(1,2),0); setrandomoption(.@part,3,rand(1,220),rand(1,2),0); setrandomoption(.@part,4,rand(1,220),rand(1,2),0);  

That error said no files has been found. Maybe try to created a new one? Or copy from other clients.

conf > maps_athena >> Uncomment moc_fild10

Have you export .bmp as 24 bit?
 
And make sure you keep the size as same as official.

- script GuideCommands -1,{ OnInit: bindatcmd "guide","GuideCommands::OnGuide"; end; OnGuide: dispbottom "Helpful"; end; }  

Many of items will be sprite missing.
Try to use https://github.com/llchrisll/ROResourceCollection and put every country sprite together.
If you know something is missing, You can also help him to correct missing sprites.

data > msgstringtable.txt
Find the wording and edit it.

Yes you can change texture of it. (Try to use GRF Editor and find these buttons).

\conf\battle\player.conf Line 180

Go to Client folders >> System >> iteminfo
Copy resourcesName from Archangel Wings to Costume Archangel Wings resourcesName.

Edit IP on '\data\luafiles514\lua files\service_korea\ExternalSettings_kr.lub'

AccountLinkedUserDataUrl = {
    Save = "http://127.0.0.1:8000/userconfig/save",
    Load = "http://127.0.0.1:8000/userconfig/load"
}
TwitterDataUrl = {
    Auth = "http://0.0.0.0:3000/twitter/user-auth",
    Upload = "http://0.0.0.0:3000/twitter/upload"
}
EmblemDataUrl = {
    Upload = "http://127.0.0.1:8000/emblem/upload",
    Download = "http://127.0.0.1:8000/emblem/download"
}

Change 127.0.0.1 to your ip address.

Hey I suggest you to use additional storage instead of increase max value.
Because somehow I remember it crash when store high-amount of items.
(Additional storage >> You can added many many special storage like VIP Storage 01, VIP Storage 02)
 
conf > inter_server

then add storage2 table on database too. (Duplicate from storage)
then simple call
openstorage2 1,STOR_MODE_GET|STOR_MODE_PUT;

if(getcharid(2) > 0){
//char in guild.
}