PKIX path buildin failed

[rusqq]

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	Ubuntu
OS version (client)	20.04 LTS
Cortex version / git hash	3.1.4-1
Package Type	sudo apt install cortex
Browser type & version	If applicable

Problem Description

Error: javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Steps to Reproduce

1. install cortex
2. edit /etc/cortex/application.conf file
3. uncomment play.http.secret.key="CHANGEME"

4. edit info about elasticsearch:

   
   search {
   # Name of the index
   index = cortex
   # ElasticSearch instance address.
   # For cluster, join address:port with ',': "http://ip1:9200,ip2:9200,ip3:9200"
   uri = "https://ip_address:9200"
   
   ## Authentication configuration
   user = "elastic"
   password = "pass"

5. add a line (i really need it because thehive and cortex are placed on the same vm)
`http.port=9005
`
6. start cortex
7. go to http://ip_address:9005
8. you can see error as attached

### Possible Solutions

### Complementary information
![image](https://user-images.githubusercontent.com/96235374/170262839-4cd01993-ad29-49f8-8a9f-ff00104b64e5.png)