SyntaxError: Unexpected token < in JSON at position 0

[hongliang]

Hello all I encountered title mentioned error while starting a sprint or change board settings, i.e. set board estimation statistics from 'Story Point' to 'Original Time Estimate'.

Could anybody give me a hand please?

When 

Jira version = 8.6.1

OS = CentOS Linux release 7.5.1804

Database = Default H2 database

[Lenin Raj]

Hi @hongliang 

This problem is very unique, do you mind raising a support ticket with us? so we can take a closer look.

[hongliang]

Hi @Lenin Raj , CA-890187 has been created as you requested.

[hongliang]

@Lenin Raj Could you please help transfer my ticket to technical support? It was assigned to licensing team and we need to get this problem solved ASAP. Thank you in advance.

[kzaier]

Hi @hongliang, your ticket has been transferred to technical support. They will reach out to you shortly. Thank you for your patience.