voila ce qui est marquer dans le détail
Exception Object
(
    [message

rotected] => Failed to launch Remote Desktop Extension server (Unknown Status -2147467259 (0x80004005))
    [string:Exception

rivate] => 
    [code

rotected] => 0
    [file

rotected] => /volume1/Web/virtualbox/lib/vboxconnector.php
    [line

rotected] => 2405
    [trace:Exception

rivate] => Array
        (
            [0] => Array
                (
                    [file] => /volume1/Web/virtualbox/lib/vboxconnector.php
                    [line] => 938
                    [function] => remote_progressGet
                    [class] => vboxconnector
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                    [progress] => 6f074782576f2803-000000000000159d
                                    [_persist] => Array
                                        (
                                            [vboxHandle] => 6f074782576f2803-000000000000159b
                                        )
                                    [fn] => progressGet
                                )
                        )
                )
            [1] => Array
                (
                    [file] => /volume1/Web/virtualbox/lib/ajax.php
                    [line] => 304
                    [function] => __call
                    [class] => vboxconnector
                    [type] => ->
                    [args] => Array
                        (
                            [0] => progressGet
                            [1] => Array
                                (
                                    [0] => Array
                                        (
                                            [progress] => 6f074782576f2803-000000000000159d
                                            [_persist] => Array
                                                (
                                                    [vboxHandle] => 6f074782576f2803-000000000000159b
                                                )
                                            [fn] => progressGet
                                        )
                                    [1] => Array
                                        (
                                            [0] => Array
                                                (
                                                    [data] => Array
                                                        (
                                                            [responseData] => Array
                                                                (
                                                                    [progress] => 6f074782576f2803-000000000000159d
                                                                    [info] => Array
                                                                        (
                                                                            [completed] => 1
                                                                            [canceled] => 
                                                                            [description] => Starting VM
                                                                            [operationDescription] => Starting virtual machine
                                                                            [timeRemaining] => Array
                                                                                (
                                                                                )
                                                                            [timeElapsed] => Array
                                                                                (
                                                                                    [days] => 16903
                                                                                    [hours] => 19
                                                                                    [minutes] => 16
                                                                                    [seconds] => 28
                                                                                )
                                                                            [percent] => 20
                                                                        )
                                                                )
                                                            [success] => 1
                                                            [key] => 53474945cfd7ac0bf8114767c209c2a6
                                                        )
                                                    [errors] => Array
                                                        (
                                                        )
                                                    [persist] => Array
                                                        (
                                                        )
                                                    [messages] => Array
                                                        (
                                                        )
                                                )
                                        )
                                )
                        )
                )
            [2] => Array
                (
                    [file] => /volume1/Web/virtualbox/lib/ajax.php
                    [line] => 304
                    [function] => progressGet
                    [class] => vboxconnector
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                    [progress] => 6f074782576f2803-000000000000159d
                                    [_persist] => Array
                                        (
                                            [vboxHandle] => 6f074782576f2803-000000000000159b
                                        )
                                    [fn] => progressGet
                                )
                            [1] => Array
                                (
                                    [0] => Array
                                        (
                                            [data] => Array
                                                (
                                                    [responseData] => Array
                                                        (
                                                            [progress] => 6f074782576f2803-000000000000159d
                                                            [info] => Array
                                                                (
                                                                    [completed] => 1
                                                                    [canceled] => 
                                                                    [description] => Starting VM
                                                                    [operationDescription] => Starting virtual machine
                                                                    [timeRemaining] => Array
                                                                        (
                                                                        )
                                                                    [timeElapsed] => Array
                                                                        (
                                                                            [days] => 16903
                                                                            [hours] => 19
                                                                            [minutes] => 16
                                                                            [seconds] => 28
                                                                        )
                                                                    [percent] => 20
                                                                )
                                                        )
                                                    [success] => 1
                                                    [key] => 53474945cfd7ac0bf8114767c209c2a6
                                                )
                                            [errors] => Array
                                                (
                                                )
                                            [persist] => Array
                                                (
                                                )
                                            [messages] => Array
                                                (
                                                )
                                        )
                                )
                        )
                )
        )
    [previous:Exception

rivate] => 
)