我部署了Rails应用程序，但是当我打开它时，我在网络浏览器中收到此错误：
应用程序错误 应用程序中发生错误，无法保存您的页面。如果您是应用程序所有者，请检查日志以获取详细信息。
以下是我的日志错误：
2018-03-19T04：48：12.360662 + 00:00 heroku [router]：at = error code = H10 desc =＆＃34; App崩溃＆＃34; method = GET path =＆＃34; /＆＃34;主机= marmelade1.herokuapp.com request_id = 613511e2-940f-4aac-8f42-7fa7f85a8a76 fwd =＆＃34; 172.90.196.64＆＃34; dyno = connect = service = status = 503 bytes = protocol = https 2018-03-19T04：48：31.712091 + 00:00 heroku [router]：at = error code = H10 desc =＆＃34; App崩溃＆＃34; method = GET path =＆＃34; /＆＃34;主机= marmelade1.herokuapp.com request_id = 813d50a1-8cee-4a57-81d5-b9f303084cf6 fwd =＆＃34; 172.90.196.64＆＃34; dyno = connect = service = status = 503 bytes = protocol = https 2018-03-19T04：48：32.039194 + 00:00 heroku [router]：at = error code = H10 desc =＆＃34; App崩溃＆＃34; method = GET path =＆＃34; /favicon.ico" 主机= marmelade1.herokuapp.com request_id = 854ceb16-62c4-430e-9771-d64bb334f006 fwd =＆＃34; 172.90.196.64＆＃34; dyno = connect = service = status = 503 bytes = protocol = https 2018-03-19T05：01：26.721459 + 00:00 heroku [router]：at = error code = H10 desc =＆＃34; App崩溃＆＃34; method = GET path =＆＃34; /＆＃34;主机= marmelade1.herokuapp.com request_id = e112728e-af23-48c1-aef2-c2fd995466dd fwd =＆＃34; 172.90.196.64＆＃34; dyno = connect = service = status = 503 bytes = protocol = https
我做错了什么？