[Koha] Error while accessing patron homepage

[Liny Varghese]

Dear all,

I am getting this error message while accessing one patron.

Can't call method "biblio" on an undefined value at
/usr/share/koha/lib/C4/Members.pm line 768.

But this error is not coming for all users and this error came only
after upgrading koha from version  3.20 to 17.

Kindly help

Liny Varghese
Information Scientist
University Library
Cochin University of Science and Technology
Kochi-22, Kerala