Nginx Version is not working in zabbix4.2/nginx-1.13.9

[anantsaraswat]

Preprocessing failed for: HTTP/1.1 200 OK..Server: nginx..Date: Wed, 27 May 2020 08:23:02 GMT..Content-Type: text/plain..Co...

1. Failed: cannot perform regular expression "Server: nginx/(.+)" match for value of type "string": pattern does not match

Moreover, I can't see any string in stub output for nginx version, not sure if I am doing anything wrong.

OUTPUT :

HTTP/1.1 200 OK
Server: nginx
Date: Wed, 27 May 2020 08:41:10 GMT
Content-Type: text/plain
Content-Length: 119
Connection: close

Active connections: 6
server accepts handled requests
98831111 98831111 103367932
Reading: 0 Writing: 3 Waiting: 3