This site cannot provide a secure connection. An unsupported protocol is used

company Https reform , All systems have been transformed , Problems found , One component just adds SSL Configuration of , But this problem appeared in the interview . A lot of online searches are saying CDN Affair , Unfortunately, my scene has nothing to do with this .

Even more surprising is , Sometimes it's OK to change a certificate ！！！

Take a closer look at this SSL Configuration of

server:
  port: 7103
  ssl:
    enabled: false
    key-store: server.jks
    key-alias: localhost
    key-store-password: 123456
    key-store-type: JKS
    trust-store: server.jks
    trust-store-password: 123456
    trust-store-type: JKS
    client-auth: need

Then the big man came to teach , Looked at the , It will be solved immediately .
reason

 This system uses non tomcat Container to run , What is used here is undertow, Just delete it 
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-undertow</artifactId>
</dependency>