Can't Create Let's Encrypt Certificate - Linux - SH 5.1.5

Server Administration
1

Running SimpleHelp 5.1.5 on Parrot Linux. Trying to setup SSL Certificate using the “Let’s Encrypt”. I enter the information in the wizard (domain and email address) and click on “Generate Certificate”. The screen blinks, but, nothing happens. My SimpleHelp server is accessible on port 80 and all the server health tests pass successfully.

From the server log, there’s a java.io.IOException as shown below. Any assistance with this would be greatly appreciated:

09/11 23:01:57.968: M611-00 07:01:57.968 (+1169801) java.io.IOException: GET https://acme-v01.api.letsencrypt.org/directory => java.net.UnknownHostException: acme-v01.api.letsencrypt.org
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at java.net.Socket.connect(Socket.java:589)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.NetworkClient.doConnect(NetworkClient.java:178)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:264)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1564)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:347)
09/11 23:01:57.968: M611-00 07:01:57.968 (+ 0) at utils.ssl.letsencrypt.LetsEncryptRequestor.http(LetsEncryptRequestor.java:753)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at utils.ssl.letsencrypt.LetsEncryptRequestor.(LetsEncryptRequestor.java:295)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at utils.ssl.letsencrypt.LetsEncryptRequestor.requestCertificate(LetsEncryptRequestor.java:904)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at com.aem.shelp.proxy.LetsEncryptUtil.requestCertificate(LetsEncryptUtil.java:43)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at com.aem.shelp.proxy.ProxyServer.doTechTransaction(ProxyServer.java:5143)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at com.aem.shelp.proxy.ProxyServer.access$1800(ProxyServer.java:302)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at com.aem.shelp.proxy.ProxyServer$TechTransactionListener.doTransaction(ProxyServer.java:4027)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at utils.message.BasicMTTransactionServer$MessageHandler.run(BasicMTTransactionServer.java:171)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at utils.progtools.OnDemandThreadPool$TimedJob.run(OnDemandThreadPool.java:300)
09/11 23:01:57.969: M611-00 07:01:57.968 (+ 0) at utils.progtools.OnDemandThreadPool$Worker.run(OnDemandThreadPool.java:355)