I've problem in opening phpmyadmin which appear as 404 error
this is error log of nginx

2017/04/09 01:44:49 [alert] 328#1560: the event "ngx_master_328" was not signaled for 5s
2017/04/09 01:44:49 [alert] 328#1560: could not respawn worker
2017/04/09 01:48:14 [alert] 2656#2660: the event "ngx_master_2656" was not signaled for 5s
2017/04/09 01:48:14 [alert] 2656#2660: could not respawn worker
2017/04/10 22:07:05 [notice] 1980#1424: signal process started
2017/04/10 22:15:25 [notice] 2712#2424: signal process started
2017/04/10 22:17:34 [notice] 2480#2560: signal process started