Skript Version: 2.2 dev31b
Skript Author: Bensku
Minecraft Version: 1.12
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Full Code:

Code (Skript):

1. function SignSearch(lines: strings, player: player):
2.    set {_loc} to location of {_player}
3.    set {_block} to type of block at {_loc}
4.    set block at {_loc} to sign
5.    loop {_lines::*}:
6.       (loop-index parsed as int) < 5
7.       set line (loop-index parsed as int) of block at {_loc} to "%colored loop-value%"
8.    wait a tick
9.    set {_packet} to new play_server_open_sign_editor packet
10.    set location pinfo 0 of {_packet} to {_loc}
11.    send {_player} packet {_packet}
12.    set block at {_loc} to {_block}
13.  
14. command /signsearch <player>:
15.     trigger:
16.         set {usingsign.%player%} to true
17.         set {_lines::*} to "", "/\/\/\/\", "Enter your" and "search!"
18.         SignSearch({_lines::*},arg)
19.  
20. on packet event play_client_update_sign:
21.     if {usingsign.%player%} is true:
22.         set {_lines::*} to string array pinfo 0 of event-packet
23.         message "You searched for: %{_lines::1}%"
24.         set {usingsign.%player%} to false
25.         stop

Errors on Reload:

Code (Skript):

1. a block can't be set to 'sign' because the latter is not an item type (r.sk, line 4: set block at {_loc} to sign')

Console Errors:

Code (Skript):

1. a block can't be set to 'sign' because the latter is not an item type (r.sk, line 4: set block at {_loc} to sign')

Addons using :
MundoSK : 1.7.4
ProtocolLib : last version
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Have you tried searching the docs? No
Have you tried searching the forums? Yes
What other methods have you tried to fix it? yes