System error

RT couldn't store your session.  This may mean that that the directory '/usr/local/request-tracker/var/session_data' isn't writable or a database table is missing or corrupt.

Can't locate Digest/MD5.pm in @INC (you may need to install the Digest::MD5 module) (@INC contains: /usr/local/request-tracker/sbin/../local/lib /usr/local/request-tracker/local/plugins/RT-Extension-MergeUsers/lib /usr/local/request-tracker/sbin/../lib /etc/perl /usr/lib/x86_64-linux-gnu/perl5/5.36 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.36 /usr/share/perl/5.36 /usr/local/lib/site_perl) at /usr/share/perl5/Apache/Session/Generate/MD5.pm line 31.

Stack:
  [/usr/share/perl5/Apache/Session/Generate/MD5.pm:31]
  [/usr/share/perl5/Apache/Session.pm:425]
  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web/Session.pm:330]
  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm:960]
  [/usr/local/request-tracker/share/html/Elements/SetupSessionCookie:51]
  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm:337]
  [/usr/local/request-tracker/share/html/autohandler:53]


Trace begun at /usr/share/perl5/HTML/Mason/Exceptions.pm line 125
HTML::Mason::Exceptions::rethrow_exception('RT couldn\'t store your session.  This may mean that that the directory \'/usr/local/request-tracker/var/session_data\' isn\'t writable or a database table is missing or corrupt.^J^JCan\'t locate Digest/MD5.pm in @INC (you may need to install the Digest::MD5 module) (@INC contains: /usr/local/request-tracker/sbin/../local/lib /usr/local/request-tracker/local/plugins/RT-Extension-MergeUsers/lib /usr/local/request-tracker/sbin/../lib /etc/perl /usr/lib/x86_64-linux-gnu/perl5/5.36 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl-base /usr/lib/x86_64-linux-gnu/perl/5.36 /usr/share/perl/5.36 /usr/local/lib/site_perl) at /usr/share/perl5/Apache/Session/Generate/MD5.pm line 31.^J^JStack:^J  [/usr/share/perl5/Apache/Session/Generate/MD5.pm:31]^J  [/usr/share/perl5/Apache/Session.pm:425]^J  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web/Session.pm:330]^J  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm:960]^J  [/usr/local/request-tracker/share/html/Elements/SetupSessionCookie:51]^J  [/usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm:337]^J  [/usr/local/request-tracker/share/html/autohandler:53]^J') called at /usr/local/request-tracker/sbin/../lib/RT/Interface/Web/Session.pm line 332
RT::Interface::Web::Session::TIEHASH('RT::Interface::Web::Session', undef) called at /usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm line 960
RT::Interface::Web::LoadSessionFromCookie at /usr/local/request-tracker/share/html/Elements/SetupSessionCookie line 51
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x55d8113397b8)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1302
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1292
HTML::Mason::Request::comp(undef, undef) called at /usr/local/request-tracker/sbin/../lib/RT/Interface/Web.pm line 337
RT::Interface::Web::HandleRequest('HASH(0x55d8113bf7b8)') called at /usr/local/request-tracker/share/html/autohandler line 53
HTML::Mason::Commands::__ANON__ at /usr/share/perl5/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x55d811283240)') called at /usr/share/perl5/HTML/Mason/Request.pm line 1300
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 1292
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/share/perl5/HTML/Mason/Request.pm line 481
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 481
eval {...} at /usr/share/perl5/HTML/Mason/Request.pm line 433
HTML::Mason::Request::exec('RT::Interface::Web::Request=HASH(0x55d80aa53708)') called at /usr/share/perl5/HTML/Mason/PSGIHandler.pm line 96
eval {...} at /usr/share/perl5/HTML/Mason/PSGIHandler.pm line 96
HTML::Mason::Request::PSGI::exec('RT::Interface::Web::Request=HASH(0x55d80aa53708)') called at /usr/share/perl5/HTML/Mason/Interp.pm line 342
HTML::Mason::Interp::exec(undef, undef) called at /usr/share/perl5/HTML/Mason/PSGIHandler.pm line 59
eval {...} at /usr/share/perl5/HTML/Mason/PSGIHandler.pm line 59
HTML::Mason::PSGIHandler::invoke_mason('HTML::Mason::PSGIHandler::Streamy=HASH(0x55d81069c828)', 'HASH(0x55d81121ef38)', 'HASH(0x55d806e3d7f0)') called at /usr/share/perl5/HTML/Mason/PSGIHandler/Streamy.pm line 52
HTML::Mason::PSGIHandler::Streamy::__ANON__('CODE(0x55d805221fc8)') called at /usr/share/perl5/Plack/Util.pm line 339
Plack::Util::__ANON__('CODE(0x55d808900cd8)') called at /usr/share/perl5/Plack/Util.pm line 339
Plack::Util::__ANON__('CODE(0x55d807a330a8)') called at /usr/share/perl5/Plack/Handler/FCGI.pm line 149
Plack::Handler::FCGI::run('Plack::Handler::FCGI=HASH(0x55d8107e8ed8)', 'CODE(0x55d8107e9808)') called at /usr/share/perl5/Plack/Loader.pm line 84
Plack::Loader::run('Plack::Loader=HASH(0x55d8107d62f0)', 'Plack::Handler::FCGI=HASH(0x55d8107e8ed8)') called at /usr/share/perl5/Plack/Runner.pm line 279
Plack::Runner::run('RT::PlackRunner=HASH(0x55d806d059f8)') called at /usr/local/request-tracker/sbin/../lib/RT/PlackRunner.pm line 150
eval {...} at /usr/local/request-tracker/sbin/../lib/RT/PlackRunner.pm line 150
RT::PlackRunner::run('RT::PlackRunner=HASH(0x55d806d059f8)') called at /usr/local/request-tracker/sbin/rt-server.fcgi line 162