Fix connect-src policy for Tesseract

config/initializers/content_security_policy.rb

@@ -36,7 +36,7 @@ if Rails.env.production?
     p.media_src       :self, :data, *data_hosts
     p.frame_src       :self, :https
     p.worker_src      :self, :blob, assets_host
-    p.connect_src     :self, :blob, Rails.configuration.x.streaming_api_base_url, *data_hosts
+    p.connect_src     :self, :blob, :data, Rails.configuration.x.streaming_api_base_url, *data_hosts
     p.manifest_src    :self, assets_host
   end
 end