class com.sun.mail.handlers.text_html cannot be cast to class javax.activation.DataContentHandler (com.sun.mail.handlers.text_html is in unnamed module of loader org.springframework.boot.loader.LaunchedURLClassLoader @4f3f5b24; javax.activation.DataContentHandler is in unnamed module of loader org.pf4j.PluginClassLoader @c2e3264).

I added the below snippet to my manager class, however, when sending the email, it takes the server datetime. The server is in a different country whereas we are sending email to German customers. Any suggestions would be helpful! Thank you!