diff --git a/lib/submissions/generate_result_attachments.rb b/lib/submissions/generate_result_attachments.rb
index 07504420..08428040 100644
--- a/lib/submissions/generate_result_attachments.rb
+++ b/lib/submissions/generate_result_attachments.rb
@@ -532,6 +532,8 @@ module Submissions
           begin
             pdf.acro_form.create_appearances(force: true) if pdf.acro_form && pdf.acro_form[:NeedAppearances]
             pdf.acro_form&.flatten
+          rescue HexaPDF::MissingGlyphError
+            nil
           rescue StandardError => e
             Rollbar.error(e) if defined?(Rollbar)
           end