Apparently, fetching the OKAPI user authorization page throws some strange timeout:
[...] <h1 style='clear: both'>Anfrage abgelaufen</h1> <p>Die Anfrage ist wegen Zeitüberschreitung abgelaufen. Bitte versuche es noch einmal.</p> </div> </body></html>
According to the log, at least three requests to the OKAPI page have failed beforehand in this case:
[Test worker] INFO org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec - Recoverable I/O exception (org.apache.hc.core5.http.NoHttpResponseException) caught when processing request to {s}->https://www.opencaching.de:443
[Test worker] INFO org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec - Recoverable I/O exception (org.apache.hc.core5.http.NoHttpResponseException) caught when processing request to {s}->https://www.opencaching.de:443
[Test worker] INFO org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec - Recoverable I/O exception (org.apache.hc.core5.http.NoHttpResponseException) caught when processing request to {s}->https://www.opencaching.de:443
I am not sure whether this is related to the migration of the Apache HttpClient library from version 4 to 5, but the error message seems to indicate that this is not related?