1. Error description
DevTools failed to load SourceMap: Could not load content for
chrome-extension://ncennffkjdiamlpmcbajkmaiiiddgioo/js/xl-content.js.map:
HTTP error: status code 404, net::ERR_UNKNOWN_URL_SCHEME
Unchecked runtime.lastError: The message port closed before a response was received.
2. Cause analysis
It is mainly caused by the use of plug-ins such as oil monkey or Xunlei in Google browser
3. Solutions
Address bar entry chrome://extensions/ , turn off the oil monkey or thunder one by one, if not, F12 – & gt; Settings – & gt; Perferences–> Sources, disable JavaScript maps and CSS maps, clear cache and re access
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