Unexpected token u in JSON at position 0

before today everything was working perfectly, but now i started receiving below error.
I am using

Kibana 7.6.2 management
ElasticIndex "number" : "7.6.2",

SyntaxError: Unexpected token u in JSON at position 0
at JSON.parse ()
at http://cne-tsl036vm:5601/bundles/commons.bundle.js:3:3397719
at http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:94842
at http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:94980
at u.$digest (http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:100155)
at http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:102127
at Yo.completeTask (http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:122692)
at http://cne-tsl036vm:5601/bundles/kbn-ui-shared-deps/kbn-ui-shared-deps.js:368:34257

Hello Galvin,

Are you trying to perform any actions when this error is triggered or is this just what happens when you load up management? Any chance you could attach a screenshot?

Regards,
Aaron