Maybe nothing but I noticed quite a lot of these when running the demo version in a web browser...
vendor.js:1823 ERROR Error: Uncaught (in promise): [object Object]
at c (polyfills.js:3)
at polyfills.js:3
at polyfills.js:3
at t.invoke (polyfills.js:3)
at Object.onInvoke (vendor.js:5134)
at t.invoke (polyfills.js:3)
at r.run (polyfills.js:3)
at polyfills.js:3
at t.invokeTask (polyfills.js:3)
at Object.onInvokeTask (vendor.js:5125)