Booted up my app on another partition, after installing everything fresh, got an unexpected error:
Uncaught TypeError: PhpDebugBar.Widgets.MailsWidget is not a constructor
DebugBar v2.1.1
Laravel v5.2.3
Chrome: 57.0.2987.133

I can workaround it by disabling its collector in config, but I was wondering what might cause this? I wasn't able to find any information on this error.
Seeing this error on Laravel 5.1.46, Debug Bar 2.4.0, on Chrome as well.
Same here.
I had same issue. Browser cache clean worked for me.
delete cache worked for me as well thanks for that
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Most helpful comment
I had same issue. Browser cache clean worked for me.