Plugin Error

Errors in plugins? Retry to Update or Configure.

OpenSSL::SSL::SSLError
SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)
/home/yatabe/local/lib/ruby/2.7.0/net/protocol.rb:44:in `connect_nonblock'
/home/yatabe/local/lib/ruby/2.7.0/net/protocol.rb:44:in `ssl_socket_connect'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:1009:in `connect'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:943:in `do_start'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:932:in `start'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:1483:in `request'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:1506:in `send_entity'
/home/yatabe/local/lib/ruby/2.7.0/net/http.rb:1294:in `post'
/home/yatabe/www/tdiary-v5.1.7/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):266:in `isbn_detail'
(TDiary::Plugin#eval_src):43:in `eval_src'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/plugin.rb:95:in `eval'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/plugin.rb:95:in `eval_src'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/base.rb:65:in `do_eval_rhtml'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/base.rb:29:in `eval_rhtml'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/view.rb:243:in `eval_rhtml'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/dispatcher/index_main.rb:37:in `run'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/dispatcher/index_main.rb:5:in `run'
/home/yatabe/www/tdiary-v5.1.7/lib/tdiary/dispatcher.rb:25:in `dispatch_cgi'
index.rb:32:in `<main>'