What are these errors? Mayan worker e stopped working too

FROM MAYAN WORKER B

[2024-05-09 06:51:10,187: ERROR/ForkPoolWorker-16] Error sending data
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/gnupg.py", line 156, in _copy_data
    outstream.write(data)
BrokenPipeError: [Errno 32] Broken pipe
[2024-05-09 06:51:10,293: ERROR/ForkPoolWorker-16] Error sending data
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/gnupg.py", line 156, in _copy_data
    outstream.write(data)
BrokenPipeError: [Errno 32] Broken pipe
[2024-05-09 06:51:26,676: ERROR/ForkPoolWorker-16] Error sending data
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/gnupg.py", line 156, in _copy_data
    outstream.write(data)
BrokenPipeError: [Errno 32] Broken pipe
[2024-05-09 06:51:26,967: ERROR/ForkPoolWorker-16] Error sending data
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/gnupg.py", line 156, in _copy_data
    outstream.write(data)
BrokenPipeError: [Errno 32] Broken pipe
[2024-05-09 06:51:27,074: ERROR/ForkPoolWorker-16] Error sending data
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/gnupg.py", line 156, in _copy_data
    outstream.write(data)

FROM MAYAN WORKER E

[2024-05-01 20:11:36,624: ERROR/MainProcess] Error on stopping Pool: MemoryError()
Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/worker/worker.py", line 202, in start
    self.blueprint.start(self)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/bootsteps.py", line 116, in start
    step.start(parent)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/bootsteps.py", line 365, in start
    return self.obj.start()
           ^^^^^^^^^^^^^^^^
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/worker/consumer/consumer.py", line 336, in start
    blueprint.start(self)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/bootsteps.py", line 116, in start
    step.start(parent)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/worker/consumer/consumer.py", line 726, in start
    c.loop(*c.loop_args())
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/worker/loops.py", line 97, in asynloop
    next(loop)
  File "/opt/mayan-edms/lib/python3.11/site-packages/kombu/asynchronous/hub.py", line 373, in create_loop
    cb(*cbargs)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/asynpool.py", line 326, in on_result_readable
    next(it)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/asynpool.py", line 307, in _recv_message
    message = load(bufv)
              ^^^^^^^^^^
_pickle.UnpicklingError: invalid load key, '\x01'.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/bootsteps.py", line 148, in send_all
    fun(parent, *args)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/bootsteps.py", line 369, in stop
    return self.obj.stop()
           ^^^^^^^^^^^^^^^
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/base.py", line 121, in stop
    self.on_stop()
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/prefork.py", line 143, in on_stop
    self._pool.join()
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/pool.py", line 1619, in join
    stop_if_not_current(self._result_handler)
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/pool.py", line 144, in stop_if_not_current
    thread.stop(timeout)
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/pool.py", line 525, in stop
    self.on_stop_not_started()
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/asynpool.py", line 360, in on_stop_not_started
    iterate_file_descriptors_safely(
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/asynpool.py", line 215, in iterate_file_descriptors_safely
    hub_method(fd, *hub_args, **hub_kwargs)
  File "/opt/mayan-edms/lib/python3.11/site-packages/celery/concurrency/asynpool.py", line 387, in _flush_outqueue
    task = reader.recv()
           ^^^^^^^^^^^^^
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/connection.py", line 275, in recv
    buf = self._recv_bytes()
          ^^^^^^^^^^^^^^^^^^
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/connection.py", line 457, in _recv_bytes
    return self._recv(size)
           ^^^^^^^^^^^^^^^^
  File "/opt/mayan-edms/lib/python3.11/site-packages/billiard/connection.py", line 419, in _recv
    chunk = read(handle, remaining)
            ^^^^^^^^^^^^^^^^^^^^^^^
MemoryError

I think mayan worker e stopped working. is there a way to restart it?