Here is the console text when I try to test the email:
triplea.engine.version.bin:1.9
java.io.IOException: javax.mail.AuthenticationFailedException: 534-5.7.14 <https: accounts.google.com=“” signin=“” continue?sarp=“1&scc=1&plt=AKgnsbtq<br”>534-5.7.14 0agWfkeYHayyW6rL-JaSHtB3tyu3InkH8_a8vkthtPAzjUvxYSB4W0R6uBXrX5TZJbjEWR
534-5.7.14 iMohYYIA8lFkmdN5htnzdgyVPllycVQKNpUGUxWM9o0j4hwbuMuWEm3tw3fedOF1cV9Bcy
534-5.7.14 uh7ejViK1gwYkAMToCnu8hId7NnDXyO7_PrxjqqIkqtQXjIgqGFDYBQLqZQd4tdqWFQZ3r
534-5.7.14 EVbXAdyJNkHpiwLd6_wIYHYw4S8KY> Please log in via your web browser and
534-5.7.14 then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 l19sm4331142pgc.57 - gsmtp
at games.strategy.engine.pbem.GenericEmailSender.sendEmail(GenericEmailSender.java:194)
at games.strategy.engine.framework.startup.ui.editors.EmailSenderEditor.lambda$testEmail$269(EmailSenderEditor.java:165)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.mail.AuthenticationFailedException: 534-5.7.14 <https: accounts.google.com=“” signin=“” continue?sarp=“1&scc=1&plt=AKgnsbtq<br”>534-5.7.14 0agWfkeYHayyW6rL-JaSHtB3tyu3InkH8_a8vkthtPAzjUvxYSB4W0R6uBXrX5TZJbjEWR
534-5.7.14 iMohYYIA8lFkmdN5htnzdgyVPllycVQKNpUGUxWM9o0j4hwbuMuWEm3tw3fedOF1cV9Bcy
534-5.7.14 uh7ejViK1gwYkAMToCnu8hId7NnDXyO7_PrxjqqIkqtQXjIgqGFDYBQLqZQd4tdqWFQZ3r
534-5.7.14 EVbXAdyJNkHpiwLd6_wIYHYw4S8KY> Please log in via your web browser and
534-5.7.14 then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/answer/78754 l19sm4331142pgc.57 - gsmtp
at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:950)
at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:861)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:766)
at javax.mail.Service.connect(Service.java:366)
at games.strategy.engine.pbem.GenericEmailSender.sendEmail(GenericEmailSender.java:186)
… 2 more</https:></https:>