Cannot see worklogs on calendar


From last week I have been not able to see my work log entries previously logged. I am able to enter new entries but they gets disappeared from the calendar once the calendar is refreshed. But I confirmed that the work logs are getting saved to Jira, only that they have now stopped showing in the calendar.

When I open the calendar, I get the below error : image

Not sure if the issue is due to above error. Can you please suggest a solution to this?

Thanks, Sajjan Halarnkar