[Bug] Error notification if you cancel the queue

[Palloxin]

Steps to reproduce

1. go to a novel, download all
2. go to the queue, "cancel downloads" (top right)

Expected behavior

No error notification

Actual behavior

LNReader version

latest build

Android version

a8

Device

huaw

Other details

Not recently introduced.

Acknowledgements

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• [x] I have updated the app to version 2.0.0.
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