DTD not supported by SOAP

Ceau, scriu aici sperand ca ma veti putea ajuta, am dat de o mica problema, am instalat VitrualBox , este un soft pentru vps oferit gratuit si am gasit o interfata pentru acest program, totu e ok, dar acuma vine problema.
Cand vreau sa accesez interfata imi apare o erroare "DTD is not supported by SOAP". Am incercat sa ma documentez dar nu vad unde nu merge si ce sa repar sau sa corectez, poate ma puteti ajuta voi, mai jos e fisieru de eroare.

Exception Object
(
	[message:protected] => DTD are not supported by SOAP
	[string:Exception:private] => 
	[code:protected] => 32
	[file:protected] => C:\xampp\htdocs\offline\phpvirtualbox\lib\vboxconnector.php
	[line:protected] => 111
	[trace:Exception:private] => Array
		(
			[0] => Array
				(
					[file] => C:\xampp\htdocs\offline\phpvirtualbox\lib\vboxconnector.php
					[line] => 1821
					[function] => __vboxwebsrvConnect
					[class] => vboxconnector
					[type] => ->
					[args] => Array
						(
						)

				)

			[1] => Array
				(
					[file] => C:\xampp\htdocs\offline\phpvirtualbox\lib\vboxconnector.php
					[line] => 218
					[function] => getMediumsCached
					[class] => vboxconnector
					[type] => ->
					[args] => Array
						(
							[0] => Array
								(
									[fn] => getMediums
								)

							[1] => Array
								(
									[data] => 
									[errors] => Array
										(
										)

									[persist] => Array
										(
										)

								)

						)

				)

			[2] => Array
				(
					[function] => __call
					[class] => vboxconnector
					[type] => ->
					[args] => Array
						(
							[0] => getMediums
							[1] => Array
								(
									[0] => Array
										(
											[fn] => getMediums
										)

									[1] => Array
										(
											[0] => Array
												(
													[data] => 
													[errors] => Array
														(
														)

													[persist] => Array
														(
														)

												)

										)

								)

						)

				)

			[3] => Array
				(
					[file] => C:\xampp\htdocs\offline\phpvirtualbox\lib\ajax.php
					[line] => 93
					[function] => getMediums
					[class] => vboxconnector
					[type] => ->
					[args] => Array
						(
							[0] => Array
								(
									[fn] => getMediums
								)

							[1] => Array
								(
									[0] => Array
										(
											[data] => 
											[errors] => Array
												(
												)

											[persist] => Array
												(
												)

										)

								)

						)

				)

		)

	[previous:Exception:private] => 
)