NoMethodError 'each' when viewing reports in _list.html.erb

Hi,
I'm encountering

NoMethodError in Reports#index

Showing /root/foreman/foreman/app/views/reports/ where line #21
raised:

undefined method `each' for "applied":String
Extracted source (around line #21):

18: <td><%= link_to h(report.host),
host_reports_path(report.host) %></td>
19: <% end -%>
20: <td><%= reported_at_column(report) %></td>
21: <td><%= report_event_column(report.applied, "label-info")
%></td>
22: <td><%= report_event_column(report.restarted, "label-info")
%></td>
23: <td><%= report_event_column(report.failed, "label-
important") %></td>
24: <td><%= report_event_column(report.failed_restarts, "label-
warning") %></td>
Trace of template inclusion: app/views/reports/index.html.erb

How should we fix this?
Please help.