Request participants field not loading

[Olivera Todorovska]

Hello,

When trying to add participants for an issue, the search fails. I am doing this in order to test adding external users so they are able to work on a ticket, but not see the whole Jira Project and its data. 

Please advise

[Kristin Lyons]

It looks like this is due to that field being used in a non Jira Service Management project - https://community.atlassian.com/t5/Jira-Software-questions/quot-Request-participants-quot-field-search-not-working/qaq-p/1409310