Using Spring Boot Rest Template gives java.lang.NoClassDefFoundError: Could not initialize class sun.net.www.protocol.http.HttpURLConnection

Question

I am trying to execute the following syntax : -

restTemplate.postForEntity(Pl4WhatsAppConstants.chatBotURL + botId + "/converse/" + senderId, entity,
                    ConverseResponses.class).getBody();

I am getting the following error : - Could not initialize class sun.net.www.protocol.http.HttpURLConnection

I am using the following version of code : -

1. JDK : openjdk version "1.8.0_272" OpenJDK Runtime Environment (build 1.8.0_272-b10) OpenJDK 64-Bit Server VM (build 25.272-b10, mixed mode)

2. Spring Boot version : 2.3.4.RELEASE

How do I add the missing class definition to the war?