Hi i dont know why when i installed the plugins and type o.plugins to check and it say 
Listing 1 plugins:
01 StackSizeController - Failed to compile: compiler version disconnected
Is i install the wrong version ? or i miss something?

You've installed the plugin correctly, you have another issue instead. 

I've had this issue before and it's really annoying. I don't remember how I resolved it (unfortunately), but try restarting your server. Also make sure that your Compiler.exe is in the same folder as the RustDedicated.exe, and that it isn't being blocked by any antivirus software.

I unearthing when i turn off fire wall.and its work..
but i cant turn off fire wall when i on the server...its danger...

You can allow the compiler through the firewall. Below is a quick summary on how to using Windows server 2019

Open windows firewall (Control Panel -> System and Security -> Windows Firewall -> Advanced settings (side menu))


You will see "Inbound Rules" and "Outbound Rules" on the left side. Selecting one should bring up a menu on the right side with "New Rule." 

Create a new inbound AND outbound program rule for the Compiler.exe, and allow the connection always. 

If you need more clarification on the matter, there are plenty of videos detailing this process in plenty of operating systems.

I m tried...but its not work
Same problem...

Could you paste your full oxide/log file here using pastebin.com please?