[RESOLVED] Incompatible parameter

[Semaph0re]

Hello, I am using happyhttp to create a class to communicate with a server. I've encountered an error that I simply can't figure out how to fix and still use my class.
It has been 4-5 hours trying to figure this out
Neccesary info about the library are as follows:

happyhttp binds 3 functions

onBegin 
OnData
onComplete

to another function

setcallbacks()

Taken from their site, these functions are defined as follows:

typedef void (*ResponseBegin_CB)( const Response* r, void* userdata )
Invoked when all the headers for a response have been received.
The Response object can be queried to determine status and header values.
userdata is the same value that was passed in to Connection::setcallbacks().

typedef void (*ResponseData_CB)( const Response* r, void* userdata, const unsigned char* data, int numbytes )
This callback is invoked to pass out data from the body of the response. It may be called multiple times, or not at all (if there is no body).

typedef void (*ResponseComplete_CB)( const Response* r, void* userdata )
Once a response is completed, this callback is invoked. When the callback returns, the respsonse object will be destroyed.

the function that these are passed to are

void setcallbacks( ResponseBegin_CB begincb, ResponseData_CB datacb, ResponseComplete_CB completecb, void* userdata )

The example that their site offers is:

static int count=0;

// invoked when response headers have been received
void OnBegin( const happyhttp::Response* r, void* userdata )
{
	printf( "BEGIN (%d %s)\n", r->getstatus(), r->getreason() );
	count = 0;
}

// invoked to process response body data (may be called multiple times)
void OnData( const happyhttp::Response* r, void* userdata, const unsigned char* data, int n )
{
	fwrite( data,1,n, stdout );
	count += n;
}

// invoked when response is complete
void OnComplete( const happyhttp::Response* r, void* userdata )
{
	printf( "COMPLETE (%d bytes)\n", count );
}


void TestGET()
{
	happyhttp::Connection conn( "www.scumways.com", 80 );
	conn.setcallbacks( OnBegin, OnData, OnComplete, 0 );

	conn.request( "GET", "/happyhttp/test.php" );

	while( conn.outstanding() )
		conn.pump();
}

http://prntscr.com/guo9y3 <-hint for the error
http://prntscr.com/guoa3d <-second instance of the error

http://prntscr.com/guoabj <-compiler output

My code is a little large to put here, the paste.ee for is is: https://paste.ee/p/QCqd0
I am not even sure how to name the type of error I'm having past "incompatible Parameter" so i have included 3 screenshots of what my compiler is telling me.

Can somebody please help me identify how to pass my functions to

setcallbacks

without this error?