javascript - Vaadin application gets hanged -

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i using vaadin development of web applications. using vaadin charts in application. when go chart window entire application getting hanged. following error given in browser console:

highcharts error #16

highcharts defined in page

this error happens second time highcharts or highstock loaded in same page, highcharts namespace defined. keep in mind highcharts.chart constructor , features of highcharts included in highstock, if running chart , stockchart in combination, need load highstock.js file.

also when check tomcat log following notification:

license warning

vaadin charts commercial product. after 30 days of evaluation use, must either acquire license or stop using it. more information commercial vaadin add-on license available @ https://vaadin.com/license/cval-2.0.

you may obtain valid license subscribing vaadin pro account @ https://vaadin.com/pro or purchasing perpetual license @ https://vaadin.com/directory.

a valid license key perpetual license key purchased vaadin directory or alternatively email address use login active vaadin pro account.

register copy of vaadin charts creating file named .vaadin.charts.developer.license containing license key in home directory or setting vaadin.charts.developer.license=license_key system property disable message. thank you.

is license related problem? there problem related highcharts 16? have spent lot of time this. appreciated.


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