javax.net.ssl.SSLException: Received fatal alert: internal_error

After updating to v5.6.1, I receive the following error message for my request. It still works in v5.6.0. Any idea what's wrong there? I haven't changed any of the project settings.

Wed Jan 12 08:39:05 CET 2022:ERROR:javax.net.ssl.SSLException: Received fatal alert: internal_error
javax.net.ssl.SSLException: Received fatal alert: internal_error
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:133)
at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:356)
at java.base/sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:293)
at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:202)
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:171)
at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1488)
at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1394)
at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:441)
at java.base/sun.security.ssl.SSLSocketImpl.ensureNegotiated(SSLSocketImpl.java:894)
at java.base/sun.security.ssl.SSLSocketImpl$AppOutputStream.write(SSLSocketImpl.java:1264)
at com.eviware.soapui.impl.wsdl.support.http.SoapUILoggingOutputStream.write(SoapUILoggingOutputStream.java:41)
at org.apache.http.impl.io.SessionOutputBufferImpl.streamWrite(SessionOutputBufferImpl.java:124)
at org.apache.http.impl.io.SessionOutputBufferImpl.flushBuffer(SessionOutputBufferImpl.java:136)
at org.apache.http.impl.io.SessionOutputBufferImpl.flush(SessionOutputBufferImpl.java:144)
at org.apache.http.impl.io.ContentLengthOutputStream.flush(ContentLengthOutputStream.java:99)
at org.apache.http.entity.ByteArrayEntity.writeTo(ByteArrayEntity.java:115)
at org.apache.http.impl.DefaultBHttpClientConnection.sendRequestEntity(DefaultBHttpClientConnection.java:156)
at org.apache.http.impl.conn.CPoolProxy.sendRequestEntity(CPoolProxy.java:160)
at org.apache.http.protocol.HttpRequestExecutor.doSendRequest(HttpRequestExecutor.java:238)
at com.eviware.soapui.impl.wsdl.support.http.HttpClientSupport$SoapUIHttpRequestExecutor.doSendRequest(HttpClientSupport.java:460)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:123)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:272)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
at com.eviware.soapui.impl.wsdl.support.http.HttpClientSupport$SoapUIHttpClient.doExecute(HttpClientSupport.java:344)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at com.eviware.soapui.impl.wsdl.support.http.HttpClientSupport$Helper.execute(HttpClientSupport.java:548)
at com.eviware.soapui.impl.wsdl.support.http.HttpClientSupport.execute(HttpClientSupport.java:614)
at com.eviware.soapui.impl.wsdl.submit.transports.http.HttpClientRequestTransport.submitRequest(HttpClientRequestTransport.java:302)
at com.eviware.soapui.impl.wsdl.submit.transports.http.HttpClientRequestTransport.sendRequest(HttpClientRequestTransport.java:232)
at com.eviware.soapui.impl.wsdl.WsdlSubmit.run(WsdlSubmit.java:120)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:832)