can't setup

[VexedPuff]

[C:\Program Files (x86)\Steam\steamapps\common\Baldur's Gate II Enhanced Edition\setup-adrian.exe] WeiDU version 24900

Choose your language:
0 [English]
1 [Francais (Traduction : Ixyon)]
2 [Deutsch (Teiluebersetzung fuer SvA, von Belryll)]
0
Using Language [English]

Using .\lang\en_us\dialog.tlk

Would you like to display the readme? [Y]es [N]o
n

Install Component [Adrian for BGII]?
[N]o, [Q]uit or choose one:
1] Adrian is a Sorcerer
2] Change Adrian's class to Cleric/Mage
3] Change Adrian's class to Mage/Thief
2

Installing [Adrian for BGII -> Change Adrian's class to Cleric/Mage] [v6.1]
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
Copying 1 file ...
Copying and patching 1 file ...
loading 1 tra file
Copying 1 file ...
ERROR: BIFF [.\DATA\ITEMS.BIF] cannot be loaded: Unix.Unix_error(20, "stat", ".\DATA\ITEMS.BIF")

ERROR locating resource for 'COPY'
Resource [bolt01.itm] not found in KEY file:
[./chitin.key]
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.
Stopping installation because of error.

ERROR Installing [Adrian for BGII -> Change Adrian's class to Cleric/Mage], rolling back to previous state
Will uninstall 28 files for [ADRIAN/ADRIAN.TP2] component 1.
Uninstalled 28 files for [ADRIAN/ADRIAN.TP2] component 1.
ERROR: Failure("resource [bolt01.itm] not found for 'COPY'")
Please make a backup of the file: SETUP-ADRIAN.DEBUG and look for support at: Spellhold Studios at http://www.shsforums.net/forum/627-adrian/
Using Language [English]

Install Component [Adrian for BGII]?
[N]o, [Q]uit or choose one:
1] Adrian is a Sorcerer
2] Change Adrian's class to Cleric/Mage
3] Change Adrian's class to Mage/Thief

[Gitjas]

RROR: BIFF [.\DATA\ITEMS.BIF] cannot be loaded: Unix.Unix_error(20, "stat", ".\DATA\ITEMS.BIF")
The installer is missing rights or your game folder is corrupted.
Please give more info on what game you are on, and if it's a Windows System, do not mod the original game folder in C:Programs but a copy elsewhere since Windows is very protective and interferes with the install process.