Need to a resolve could not secure connection error

Need to a resolve could not secure connection error

Closed - This job posting has been filled and work has been completed.

Job Description

I have a webservice.

https://vlt.ntu.edu.sg/lecturer/login/login_final.php?username=USERNAME&password=PASSWORD

It connects to another ldap server. It was working fine. We restarted our server and I am getting this error.
"could not secure connection".

I suspect need to restart or start some services to make the connection.

My server is CentOS. I will provide browser SSH via Teamviewer to correct it.

Need to correct the error.

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