Fix nil error when trying to fetch key for signature verification (#17747)

diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb
index c6557817d0a4813a4d3ad19365d56450249ea52f..ef16eef0864ae2814536c58614929833a15dd60d 100644 (file)
--- a/app/helpers/jsonld_helper.rb
+++ b/app/helpers/jsonld_helper.rb
@@ -54,7 +54,7 @@ module JsonLdHelper
   end
 
   def unsupported_uri_scheme?(uri)
-    !uri.start_with?('http://', 'https://')
+    uri.nil? || !uri.start_with?('http://', 'https://')
   end
 
   def invalid_origin?(url)