I received this error when trying to reload a plugin through RCON. I also noticed that my server RAM usage had jumped up by about 3GB in the previous hour or so before trying to reload the plugin, but my service doesn't have a RAM max limit, so the server was fine on that end.

Exception while starting compiler version :  (Win32Exception: ApplicationName='/home/tcavirtualsvr14/garyl/113/Compiler.x86_x64', CommandLine='/service /logPath:/home/tcavirtualsvr14/garyl/113/oxide/logs', CurrentDirectory='', Native error= Out of memory)
  at System.Diagnostics.Process.StartWithCreateProcess (System.Diagnostics.ProcessStartInfo startInfo) [0x002dc] in :0 
  at System.Diagnostics.Process.Start () [0x0003a] in :0 
  at (wrapper remoting-invoke-with-check) System.Diagnostics.Process.Start()
  at Oxide.Plugins.PluginCompiler.CheckCompiler () [0x001f3] in :0 
Compiler may not be set as executable; chmod +x or 0744/0755 required
Win32 NativeErrorCode: 14 ErrorCode: -2147467259 HelpLink: 
Error while compiling: compiler version  couldn't be started

Unfortunately, there isn't much we can do with that compiler. If it says it ran out of memory, it wasn't able to get any more usable memory to complete whatever it was trying to compile. It should generally not use anywhere near that amount of memory, so it's likely it ran into an issue with a specific plugin. That compiler will be replaced once uMod (not Oxide, which you are using now) is released though.

All I can suggest is to try each plugin individual to see if you can find a culprit.

Sounds good! I mainly wanted to pass along the error in case it proved to be useful for any development efforts.