I'm using an external library (oidc-client) and I am getting this error in IE/Edge, but otherwise it works fine in Chrome/Firefox.

I'd like to understand what could be the cause of this zone.js error. The app is an Angular 5 app.

SCRIPT5007: Unable to get property '__zone_symbol__xhrScheduled' of undefined or null reference
zone.js (2959,1)
ERROR TypeError: Unable to get property 'current' of undefined or null reference
SCRIPT5007: Unable to get property 'stackTraceLimit' of undefined or null referenceeval code (1466) (119,9)
SCRIPT5007: Unable to get property '__zone_symbol__xhrScheduled' of undefined or null referencezone.js (2959,1)
ERROR TypeError: Unable to get property 'current' of undefined or null reference
SCRIPT5007: Unable to get property 'stackTraceLimit' of undefined or null referenceeval code (1466) (119,9)
SCRIPT5007: Unable to get property '__zone_symbol__xhrScheduled' of undefined or null referencezone.js (2959,1)
ERROR TypeError: Unable to get property 'current' of undefined or null reference
SCRIPT5007: Unable to get property 'stackTraceLimit' of undefined or null referenceeval code (1466) (119,9)
SCRIPT5007: Unable to get property '__zone_symbol__xhrScheduled' of undefined or null referencezone.js (2959,1)
ERROR TypeError: Unable to get property 'current' of undefined or null reference
SCRIPT5007: Unable to get property 'stackTraceLimit' of undefined or null referenceeval code (1466) (119,9)
SCRIPT5007: Unable to get property '__zone_symbol__xhrScheduled' of undefined or null referencezone.js (2959,1)
SCRIPT5007: Object expectedzone.js (192,1)

Thanks for any help.