I am afraid that I cannot read what the error is saying. Would you send the error message in English?
With that said, make sure that you are using the latest KendoUI version - the current release is 2019.2.619. In case the error persists, would you send us a runnable sample where it is replicated? This will enable us to examine it locally and look for its cause.
Regards,
Viktor Tachev
Progress Telerik
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