emulator 4 and 5 inspect in new crome

when i test my app in webos 4 and 5 that inspect give error show below
Uncaught TypeError: document.registerElement is not a function at UI.registerCustomElement (shell.js:3108:375) at shell.js:3120:144 at shell.js:3122:2038Understand this error devtools_app.js:9 Uncaught ReferenceError: SDK is not defined at devtools_app.js:9:239Understand this error inspector.js:2 Uncaught ReferenceError: SDK is not defined at inspector.js:2:79Understand this error :63712/favicon.ico:1 Failed to load resource: the server responded with a status of 404 (Not Found)

register element is not a function so how i can see element error related to those versions

Please refer to Launch Web Inspector and use Chrome v68. Thank you.