backup error

4539 Files to check / download
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..  .e.........................eee........... .....  ...Exception in thread "MTProtoWatchdog-exec-thread-1" java.lang.Error: java.nio.channels.ClosedChannelException
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.nio.channels.ClosedChannelException
        at java.nio.channels.spi.AbstractSelectableChannel.configureBlocking(Unknown Source)
        at com.github.badoualy.telegram.mtproto.transport.MTProtoTcpConnection.unregister(MTProtoTcpConnection.kt:120)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog.stop(MTProtoWatchdog.kt:132)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog$run$2$1$1.run(MTProtoWatchdog.kt:63)
        ... 3 more
Exception in thread "MTProtoWatchdog-exec-thread-2" java.lang.Error: java.nio.channels.ClosedChannelException
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.nio.channels.ClosedChannelException
        at java.nio.channels.spi.AbstractSelectableChannel.configureBlocking(Unknown Source)
        at com.github.badoualy.telegram.mtproto.transport.MTProtoTcpConnection.unregister(MTProtoTcpConnection.kt:120)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog.stop(MTProtoWatchdog.kt:132)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog$run$2$1$1.run(MTProtoWatchdog.kt:63)
        ... 3 more

Telegram took too long to respond to our request.
I'm going to wait a minute and then try again.
Exception in thread "MTProtoWatchdog-exec-thread-4" java.lang.Error: java.nio.channels.ClosedChannelException
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.nio.channels.ClosedChannelException
        at java.nio.channels.spi.AbstractSelectableChannel.configureBlocking(Unknown Source)
        at com.github.badoualy.telegram.mtproto.transport.MTProtoTcpConnection.unregister(MTProtoTcpConnection.kt:120)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog.stop(MTProtoWatchdog.kt:132)
        at com.github.badoualy.telegram.mtproto.MTProtoWatchdog$run$2$1$1.run(MTProtoWatchdog.kt:63)
        ... 3 more