Plugin Error

Errors in plugins? Retry to Update or Configure.

OpenSSL::SSL::SSLError
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
/home/yatabe/local/lib/ruby/2.4.0/net/protocol.rb:44:in `connect_nonblock'
/home/yatabe/local/lib/ruby/2.4.0/net/protocol.rb:44:in `ssl_socket_connect'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:948:in `connect'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:887:in `do_start'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:876:in `start'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:1407:in `request'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:1430:in `send_entity'
/home/yatabe/local/lib/ruby/2.4.0/net/http.rb:1218:in `post'
/home/yatabe/www/tdiary-v5.1.1/lib/aws/pa_api.rb:61:in `get_items'
(plugin/amazon.rb):159:in `rescue in amazon_get'
(plugin/amazon.rb):151:in `amazon_get'
(plugin/amazon.rb):274:in `isbn_image_left'
(TDiary::Plugin#eval_src):35:in `eval_src'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/plugin.rb:95:in `eval'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/plugin.rb:95:in `eval_src'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/base.rb:65:in `do_eval_rhtml'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/base.rb:29:in `eval_rhtml'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/view.rb:140:in `eval_rhtml'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/dispatcher/index_main.rb:37:in `run'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/dispatcher/index_main.rb:5:in `run'
/home/yatabe/www/tdiary-v5.1.1/lib/tdiary/dispatcher.rb:25:in `dispatch_cgi'
index.rb:32:in `<main>'