我在LARAVEL 5.5中面临以下问题。
Composer的自我更新，composer的更新和composer的安装会尝试一切，但不能解决问题
请帮助。
致命错误：未捕获错误：调用D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Formatter \ NormalizerFormatter.php：95中未定义的方法DateTime :: format（） ：＃0 D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Formatter \ NormalizerFormatter.php（88）：Monolog \ Formatter \ NormalizerFormatter-> normalize（Object（DateTime），1）＃ 1 D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Formatter \ NormalizerFormatter.php（44）：Monolog \ Formatter \ NormalizerFormatter-> normalize（Array）＃2 D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Formatter \ LineFormatter.php（70）：Monolog \ Formatter \ NormalizerFormatter-> format（Array）＃3 D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Handler \ AbstractProcessingHandler.php（37）：Monolog \ Formatter \ LineFormatter-> format（Array）＃4 D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Logger.php（344）：Monolog \ Handler \ AbstractProcessingHandler-> handle（Array）＃5 D：\ wamp \ www \ commerx \ healme \第95行上的vendor \ monolog \ monolog \ src \ Monolog \ Log登录到D：\ wamp \ www \ commerx \ healme \ vendor \ monolog \ monolog \ src \ Monolog \ Formatter \ NormalizerFormatter.php