Plugin ErrorErrors in plugins? Retry to Update or Configure. NoMethodError undefined method `first' for nil:NilClass (plugin/twitter_summary_card.rb):15:in `twitter_summary_card_description' (plugin/twitter_summary_card.rb):38:in `block (2 levels) in load_plugin' /tdiary/tdiary-core/lib/tdiary/plugin.rb:114:in `block in header_proc' /tdiary/tdiary-core/lib/tdiary/plugin.rb:113:in `each' /tdiary/tdiary-core/li
