[Spark 3.0.2] Very long error window


I installed the 3.0.2 version. I transfer the configuration file to workstations via batch.
I thought about adding a user login to it. This resulted in a very long error window.

org.jivesoftware.smack.SmackException$SmackSaslException: No supported and enabled SASL Mechanism provided by server. Server announced mechanisms: [PLAIN]. Registered SASL mechanisms with Smack: [SASL Mech: SCRAM-SHA-1-PLUS, Prio: 100, SASL Mech: SCRAM-SHA-1, Prio: 110, SASL Mech: DIGEST-MD5, Prio: 200, SASL Mech: CRAM-MD5, Prio: 300, SASL Mech: PLAIN, Prio: 400, SASL Mech: X-OAUTH2, Prio: 410, SASL Mech: EXTERNAL, Prio: 500, SASL Mech: ANONYMOUS, Prio: 500, SASL Mech: EXTERNAL, Prio: 500]. Enabled SASL mechanisms for this connection: null. Blacklisted SASL mechanisms: [SCRAM-SHA-1-PLUS]. Skip reasons: [Skipping SASL Mech: PLAIN, Prio: 400 because a password is required for it, but none was provided to the connection configuration]
	at org.jivesoftware.smack.SASLAuthentication.selectMechanism(SASLAuthentication.java:366)
	at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:188)
	at org.jivesoftware.smack.AbstractXMPPConnection.authenticate(AbstractXMPPConnection.java:897)
	at org.jivesoftware.smack.tcp.XMPPTCPConnection.loginInternal(XMPPTCPConnection.java:382)
	at org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:638)
	at org.jivesoftware.gui.LoginUIPanel.login(LoginUIPanel.java:1273)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

If there is no user and I run Spark, a short message about an invalid login or password will appear. But if I run Spark only with a login, without a password, such a long error message is generated.

And from the configuration file: