Runtime exception

[yonghenghuanmie]

Run WebDriver browser = Start(Edge()); will throw an exception, "JSON parser error (syntax error at line 1 near: ) at line 179, file D:\迅雷下载\Develope\webdriverxx\src\include\webdriverxx\detail\resource.h called from webdriverxx::detail::Resource::ProcessResponse (HTTP code: 503, body: ) called from webdriverxx::detail::Resource::Upload (request: POST, command: session, resource: http://localhost:4444/wd/hub/, data: {"capabilities":{"firstMatch":[{"browserName":"MicrosoftEdge","browserVersion":"","platformName":"ANY"}]},"requiredCapabilities":{"firstMatch":[{"browserName":"MicrosoftEdge","browserVersion":"","platformName":"ANY"}]}}) called from webdriverxx::Client::CreateSession".
Selenium and EdgeWebdriver seem to receive nothing.