Js error when tabbing through open files in vscode.

[valeryan]

I keep getting these errors over and over again as I tab through open documents using this extension.

TypeError: Cannot read property 'document' of undefined
	at context.subscriptions.push.vscode.window.onDidChangeActiveTextEditor (/home/samuel/.vscode/extensions/mehedidracula.php-namespace-resolver-1.1.4/src/extension.js:66)
	at e.fire (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:44)
	at /usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:620
	at e.fire (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:44)
	at e.$acceptDocumentsAndEditorsDelta (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:527)
	at t._doInvokeHandler (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:644)
	at t._invokeHandler (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:643)
	at t._receiveRequest (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:642)
	at t._receiveOneMessage (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:641)
	at /usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:638
	at /usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:38
	at e.fire (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:44)
	at a (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:170)
	at Socket.f._socketDataListener (/usr/share/code/resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:170)
	at Socket.emit (events.js:182)
	at addChunk (_stream_readable.js:279)
	at readableAddChunk (_stream_readable.js:264)
	at Socket.Readable.push (_stream_readable.js:219)
	at Pipe.onread (net.js:636)