If i will compile the plugin with sourcemod 1.7.2 stable it comes these errors. But i have used here the version from your github
SourcePawn Compiler 1.7.2
Copyright (c) 1997-2006 ITB CompuPhase
Copyright (c) 2004-2014 AlliedModders LLC
C:\Program Files (x86)\PawnStudio\scripting\tEasyFTP.sp(9

: error 130: cannot coerce functions to values
C:\Program Files (x86)\PawnStudio\scripting\tEasyFTP.sp(329) : error 130: cannot coerce functions to values
2 Errors.
Compilation Time: 0,67 sec
Please can someone update the plugin?