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JavaScript

Why am I getting error messages on my Javascript console before typing in code?

I'm going through the Javascript Basics module but every time I open the Javascript console I get about 20 lines of error messages even I after I reset. Why is this happening? Here's an example:

JQMIGRATE: Migrate is installed with logging active, version 1.4.1 connect.facebook.net/en_US/fbevents.js:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT head_vendor-5b9ebdc4a02e1b2e5ee764c861e9bbb31c76ac261c1825fea64a849cc73d8085.js:1185 [bugsnag] Ignoring cross-domain or eval script error. See docs: https://tinyurl.com/y94fq5zm t @ head_vendor-5b9ebdc4a02e1b2e5ee764c861e9bbb31c76ac261c1825fea64a849cc73d8085.js:1185 d3cxv97fi8q177.cloud…58b85e71.min.js:392 Uncaught SyntaxError: Unexpected end of input head_vendor-5b9ebdc4a02e1b2e5ee764c861e9bbb31c76ac261c1825fea64a849cc73d8085.js:1185 [bugsnag] Ignoring cross-domain or eval script error. See docs: https://tinyurl.com/y94fq5zm t @ head_vendor-5b9ebdc4a02e1b2e5ee764c861e9bbb31c76ac261c1825fea64a849cc73d8085.js:1185 d3cxv97fi8q177.cloud…58b85e71.min.js:392 Uncaught SyntaxError: Unexpected end of input DevTools failed to load source map: Could not load content for https://static.teamtreehouse.com/assets/maps/head_vendor-713ef2340d38a3f67ce2146de466ddaaa0e8afae057b45037b14d17478c9975a.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE DevTools failed to load source map: Could not load content for https://static.teamtreehouse.com/assets/maps/application-b0078a829d493c26ace66d4dc08ff6801d2ab5b76d84eab62e47646a0c394d74.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE DevTools failed to load source map: Could not load content for https://static.teamtreehouse.com/assets/maps/application_vendor-c32d4d8bfaf2ffd339675db173e159ccda258c7e6b2158a2c362c049a9033bcf.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE