Here is the trace of the error :
Error
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Anki 2.1.35 (4e12c7ef) Python 3.8.2 Qt 5.12.2 PyQt 5.12.1
Platform: Linux
Flags: frz=False ao=False sv=1
Add-ons, last update check: 2020-10-09 22:26:30
Caught exception:
Traceback (most recent call last):
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/aqt/taskman.py”, line 87, in _on_closures_pending
closure()
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/aqt/taskman.py”, line 59, in
lambda future: self.run_on_main(lambda: on_done(future))
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/aqt/exporting.py”, line 167, in on_done
future.result()
File “/usr/lib/python3.8/concurrent/futures/_base.py”, line 432, in result
return self.__get_result()
File “/usr/lib/python3.8/concurrent/futures/_base.py”, line 388, in __get_result
raise self._exception
File “/usr/lib/python3.8/concurrent/futures/thread.py”, line 57, in run
result = self.fn(*self.args, **self.kwargs)
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/aqt/exporting.py”, line 161, in do_export
self.exporter.exportInto(file)
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/exporting.py”, line 325, in exportInto
media = self.doExport(z, path)
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/exporting.py”, line 333, in doExport
AnkiExporter.exportInto(self, colfile)
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/exporting.py”, line 192, in exportInto
self.dst = Collection(path)
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/collection.py”, line 55, in init
self.reopen()
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/collection.py”, line 267, in reopen
self.backend.open_collection(
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/rsbackend_gen.py”, line 468, in open_collection
output.ParseFromString(self._run_command(63, input))
File “/snap/anki-woodrow/27/lib/python3.8/site-packages/anki/rsbackend.py”, line 267, in _run_command
raise proto_exception_to_native(err)
anki.rsbackend.DBError: Anki already open, or media currently syncing.