Please help I am getting problem with plugin

Hi,
I am getting error on profile page of users, it saying critical error, here is link
https://myquery.co.uk/questions/profile/jasmine/about-user/
Can you please help me on this error, I tried everything but not getting any solution, In this wordpress theme its working fine but after speed optimization I found this error, I undo all my speed optimization work but still this issue is not able to resolve.
Thanks you,