NoMethodError in Events#flyer

Showing /home/paolohu/azcc/web/app/views/events/flyer.html.erb where line #47 raised:

undefined method `TimeControl' for nil:NilClass
Extracted source (around line #47):
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<tr>
<td class="flyerBold">Round Times</td>
<td class="flyerNormal"><%= @event.eventroundtimes[0].TimeControl %></td>
<td class="flyerBold" style="text-align: right;">R1:</td>
<td class="flyerNormal" style="text-align: center;"><%= @event.eventroundtimes[0].R1 %></td>
<td class="flyerBold" style="text-align: right;">R2:</td>

Rails.root: /home/paolohu/azcc/web

Application Trace | Framework Trace | Full Trace

Request

Parameters:

{"id"=>"202305201339755"}

Response

Headers:

None