File download fails

WARN 02-25 13:17:33.295 o.a.w.p.DefaultPageLockManager:139 [nio-5443-exec-9] - Thread 'https-jsse-nio-5443-exec-9' failed to acquire lock to page with id '1', attempted for PT1M0.000079S out of allowed PT1M. The thread that holds the lock has name 'https-jsse-nio-5443-exec-8'.
WARN 02-25 13:17:33.342 o.a.w.p.DefaultPageLockManager:114 [nio-5443-exec-9] - "https-jsse-nio-5443-exec-8" daemon prio=5 tid=103 state=TIMED_WAITING
org.apache.wicket.util.lang.Threads$ThreadDump: null
at java.base@11.0.10/jdk.internal.misc.Unsafe.park(Native Method)
at java.base@11.0.10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java.base@11.0.10/java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedNanos(AbstractQueuedSynchronizer.java:1079)
at java.base@11.0.10/java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireSharedNanos(AbstractQueuedSynchronizer.java:1369)
at java.base@11.0.10/java.util.concurrent.CountDownLatch.await(CountDownLatch.java:278)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.awaitLatch(NioEndpoint.java:1157)
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ERROR 02-25 13:17:33.360 o.a.w.p.w.a.AbstractWebSocketProcessor:281 [nio-5443-exec-9] - An error occurred during processing of a WebSocket message
org.apache.wicket.page.CouldNotLockPageException: Could not lock page 1. Attempt lasted PT1M
at org.apache.wicket.page.DefaultPageLockManager.lockPage(DefaultPageLockManager.java:170)
at org.apache.wicket.page.PageAccessSynchronizer.lockPage(PageAccessSynchronizer.java:72)
at org.apache.wicket.page.PageAccessSynchronizer$1.getPage(PageAccessSynchronizer.java:116)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor.getPage(AbstractWebSocketProcessor.java:340)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor.broadcastMessage(AbstractWebSocketProcessor.java:258)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor.onMessage(AbstractWebSocketProcessor.java:151)
at org.apache.wicket.protocol.ws.javax.JavaxWebSocketProcessor$StringMessageHandler.onMessage(JavaxWebSocketProcessor.java:65)
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