Uncaught SyntaxError eonet_live_notifications.js

Hello!
On any page this error appears (Google Chrome, Firefox):

VM51498:1 Uncaught SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at Object.success (eonet_live_notifications.js?ver=1:83)
at i (jquery.js?ver=1.12.4:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4:2)
at y (jquery.js?ver=1.12.4:4)
at XMLHttpRequest.c (jquery.js?ver=1.12.4:4)
(anonymous) @ eonet_live_notifications.js?ver=1:83
i @ jquery.js?ver=1.12.4:2
fireWith @ jquery.js?ver=1.12.4:2
y @ jquery.js?ver=1.12.4:4
c @ jquery.js?ver=1.12.4:4
XMLHttpRequest.send (async)
send @ jquery.js?ver=1.12.4:4
ajax @ jquery.js?ver=1.12.4:4
n.(anonymous function) @ jquery.js?ver=1.12.4:4
eoFetchNotifications @ eonet_live_notifications.js?ver=1:79
(anonymous) @ eonet_live_notifications.js?ver=1:101
(anonymous) @ eonet_live_notifications.js?ver=1:104:

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