400 Bad RequestThe SSL certificate error

[monah1983]

2018/02/27 17:07:51 [alert] 6852#6852: *36 ignoring stale global SSL error
(SSL: error:0D0C50A1:asn1 encoding routines:ASN1_item_verify:unknown message
digest algorithm) while waiting for request, client: 000000, server:
000000:443
2018/02/27 17:22:56 [alert] 6852#6852: *350 ignoring stale global SSL error
(SSL: error:0D0C50A1:asn1 encoding routines:ASN1_item_verify:unknown message
digest algorithm) while waiting for request, client: 0000, server: 000:443

Posted at Nginx Forum: https://forum.nginx.org/read.php?21,278799,278806#msg-278806