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check the sourcemod logs to see if it tells you anything about why tf2attributes is crashing

L 04/28/2021 - 01:02:38: SourceMod error session started
L 04/28/2021 - 01:02:38: Info (map "mvm_ghost_town") (file "D:\Tf2Sunucu\server\tf\addons\sourcemod\logs\errors_20210428.log")
L 04/28/2021 - 01:02:38: [SM] Exception reported: Could not initialize call to CEconItemSchema::GetAttributeDefinition
L 04/28/2021 - 01:02:38: [SM] Blaming: tf2attributes.smx
L 04/28/2021 - 01:02:38: [SM] Call stack trace:
L 04/28/2021 - 01:02:38: [SM] [0] SetFailState
L 04/28/2021 - 01:02:38: [SM] [1] Line 142, /home/forums/content/files/8/4/3/0/4/116848.attach::OnPluginStart
L 04/28/2021 - 01:02:38: [SM] Unable to load plugin "tf2attributes.smx": Error detected in plugin startup (see error logs)
L 04/28/2021 - 01:02:38: [SM] Unable to load plugin "tf2attributes_example.smx": Could not find required plugin "tf2attributes"

these

Not sure exactly what the issue is, but make sure you have the latest version of tf2attributes, your sourcemod gamedata file is correctly set up for tf2, and your server is connected to steam

Source mod 1.11. I dropped it directly into the tf folder. I'm using tf2attributes 1.2.1 and don't know how to connect the server to steam.

It should automatically run steamcmd and connect to steam if you're using the default srcds_run script to start the server, but it's possible for it to lose connection or for steam to hang (maybe it just didn't reconnect after steam came back up today). Restarting the server should fix it if that's the case.

SM 1.11 may still cause issues with some plugins, be warned. 1.10 has been stable. Try using 1.10 and seeing if it still breaks.

It's still the same. It breaks again.

So in short, I want to install the BWR2 mode on the server I will install from steamcmd.I would be glad if you help.