Upgrade to 5.0.8: The given param '' in 'TypeIDs' is invalid!

[Koko]

Hi!

My Ticket Search no longer works in 5.0.8, following upgrades from 3.0.

I get no results, syslog says:

[Error][Kernel::System::Ticket::TicketSearch::TicketSearch][396] The given param '' in 'TypeIDs' is invalid!

Does anyone have an idea what those TypeIDs are? Where are they coming from?
Error is logged in Kernel/System/Ticket/TicketSearch.pm


Thanks in advance!
Korbinian

[Koko]

Anyone? There's got to be someone here who has an understanding of the source?