[Koha] Help required for problem related with KOHA

Dear , Help is required to rectify the problem crop up while trying to access KOHA ... The problem generated is as follows : Software error: Can't call method "STORE" on an undefined value at /usr/share/perl5/DBIx/Connector.pm line 38. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 88. Compilation failed in require at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 23. BEGIN failed--compilation aborted at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 23. For help, please send mail to the webmaster ([no address given]), giving this error message and the time and date of the error. Kindly advice... Thank You