After upgrading to RT 5.0.0 from RT 4.4.4 we’re seeing the following error on the home page where the “Saved search” dashboard widget should be:
“An internal RT error has occurred. Your administrator can find more details in RT’s log files.”
The log file shows the following:
 [Tue Aug 11 01:22:02 2020] [error]: Can't locate object method "ColumnMapClassName" via package "RT::SavedSearch" at /opt/production/rt5.0/share/html/Elements/CollectionAsTable/Header line 74. Stack: [/opt/production/rt5.0/share/html/Elements/CollectionAsTable/Header:73] [/opt/production/rt5.0/share/html/Elements/CollectionList:143] [/opt/production/rt5.0/share/html/Elements/SavedSearches:59] [/opt/production/rt5.0/share/html/Widgets/TitleBox:61] [/opt/production/rt5.0/share/html/Elements/SavedSearches:67] [/opt/production/rt5.0/share/html/Elements/MyRT:99] [/opt/production/rt5.0/share/html/index.html:78] [/opt/production/rt5.0/sbin/../lib/RT/Interface/Web.pm:710] [/opt/production/rt5.0/sbin/../lib/RT/Interface/Web.pm:389] [/opt/production/rt5.0/share/html/autohandler:53 (/opt/production/rt5.0/sbin/../lib/RT/Interface/Web/Handler.pm:209)
Any ideas? I can’t even see which saved search is the problem so don’t know where to begin troubleshooting.