Steps to reproduce:
Try to search for anything in the Global Phabricator search
Expected response: results
Actual response, the following errors:
Unhandled Exception ("TypeError") Unhandled Exception ("TypeError") Argument 1 passed to PhabricatorHandleQuery::withPHIDs() must be of the type array, object given, called in /srv/deployment/phabricator/deployment-cache/revs/4547f31de8f69854e0cd9d3e0a802ce517360ee0/phabricator/src/applications/search/query/PhabricatorSearchDocumentQuery.php on line 61
Workaround:
Don't use the global search but an application specific search, e.g. https://phabricator.wikimedia.org/maniphest/query/advanced/ for Maniphest tasks.