After a recent upgrade from 4.7.29 to 5.2.1 (Joomla) I am experiencing the following problem:
After doing an Events/Find Participants search and selecting some or all participants, the "Print selected rows" option in no longer appearing in the Actions dropdown.
An Advanced Search when displaying results as Event Participants also is missing this option. The option does appear when results are displayed as Contacts.
I have verified the same behavior on dmaster.demo (running 5.4.alpha1).