Is anyone familiar with the below stack trace trying to connect Keycloak to Tomcat, please?

type Exception report

message Could not create authentication request.

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.RuntimeException: Could not create authentication request.
	org.keycloak.adapters.saml.AbstractInitiateLogin.challenge(AbstractInitiateLogin.java:63)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.executeAuthenticator(AbstractSamlAuthenticatorValve.java:247)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.authenticateInternal(AbstractSamlAuthenticatorValve.java:222)
	org.keycloak.adapters.saml.tomcat.SamlAuthenticatorValve.authenticate(SamlAuthenticatorValve.java:42)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:574)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.invoke(AbstractSamlAuthenticatorValve.java:184)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	java.lang.Thread.run(Thread.java:744)

root cause

java.lang.RuntimeException: java.io.IOException: Buffer overflow, no sink 4096 4096
	org.keycloak.adapters.saml.CatalinaSamlSessionStore.saveRequest(CatalinaSamlSessionStore.java:226)
	org.keycloak.adapters.saml.AbstractInitiateLogin.challenge(AbstractInitiateLogin.java:58)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.executeAuthenticator(AbstractSamlAuthenticatorValve.java:247)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.authenticateInternal(AbstractSamlAuthenticatorValve.java:222)
	org.keycloak.adapters.saml.tomcat.SamlAuthenticatorValve.authenticate(SamlAuthenticatorValve.java:42)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:574)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.invoke(AbstractSamlAuthenticatorValve.java:184)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	java.lang.Thread.run(Thread.java:744)

root cause

java.io.IOException: Buffer overflow, no sink 4096 4096
	org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:477)
	org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:366)
	org.apache.catalina.authenticator.FormAuthenticator.saveRequest(FormAuthenticator.java:664)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.keycloakSaveRequest(AbstractSamlAuthenticatorValve.java:253)
	org.keycloak.adapters.saml.CatalinaSamlSessionStore.saveRequest(CatalinaSamlSessionStore.java:224)
	org.keycloak.adapters.saml.AbstractInitiateLogin.challenge(AbstractInitiateLogin.java:58)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.executeAuthenticator(AbstractSamlAuthenticatorValve.java:247)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.authenticateInternal(AbstractSamlAuthenticatorValve.java:222)
	org.keycloak.adapters.saml.tomcat.SamlAuthenticatorValve.authenticate(SamlAuthenticatorValve.java:42)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:574)
	org.keycloak.adapters.saml.AbstractSamlAuthenticatorValve.invoke(AbstractSamlAuthenticatorValve.java:184)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	java.lang.Thread.run(Thread.java:744)