Regression, the search combobox does not have any entries anymore and is blank by default

It regressed recently.

Expected result
some entries should be available in the search destination combobox, and one entry should be selected by default

Observed result
no entries, nothing selected, default search gives an error therefore
0.4.15-dev-765-gb8e936a_search.log
0.4.15-dev-765-gb8e936a_search.webm