Shield

error occurred while processing 'getCachedMessages: TypeError: can't access dead object
Stack: WCA_preparePageErrorForRemote@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:1520:11
WCA_onGetCachedMessages/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:820:25
WCA_onGetCachedMessages@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:817:11
onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1769:15
send/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:570:13
exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14
exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14
Line: 1520, column: 11  main.js:1632
"onPacket threw an exception: Error: Server did not specify an actor, dropping packet: {"error":"unknownError","message":"error occurred while processing 'getCachedMessages: TypeError: can't access dead object\nStack: WCA_preparePageErrorForRemote@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:1520:11\nWCA_onGetCachedMessages/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:820:25\nWCA_onGetCachedMessages@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/actors/webconsole.js:817:11\nonPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/server/main.js:1769:15\nsend/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:570:13\nexports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14\nexports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14\nLine: 1520, column: 11"}
Stack: onPacket@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/client/main.js:943:9
send/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/transport/transport.js:570:13
exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14
exports.makeInfallible/<@resource://gre/modules/commonjs/toolkit/loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:101:14
Line: 943, column: 9"  ThreadSafeDevToolsUtils.js:80
timeout: Connection timeout. Check the Error Console on both ends for potential error messages. Reopen the Web Console to try again.
A promise chain failed to handle a rejection. Did you forget to '.catch', or did you forget to 'return'?
See https://developer.mozilla.org/Mozilla/JavaScript_code_modules/Promise.jsm/Promise

Date: Mon Mar 20 2017 16:09:06 GMT+0200 (GTB Standard Time)
Full Message: [object Object]
Full Stack: JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: register :: line 199
JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: completePromise :: line 711
JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: process :: line 958
JS frame :: resource://gre/modules/Promise.jsm -> resource://gre/modules/Promise-backend.js :: walkerLoop :: line 806  (unknown)