NullPointerException in TtsFragment.onReadFinished()

[di72nn]

Version 226.
Google Pixel 4 (flame), 5632MB RAM, Android 11:

java.lang.NullPointerException:
  at fr.gaulupeau.apps.Poche.tts.TtsFragment.onReadFinished (TtsFragment.java:647)
  at fr.gaulupeau.apps.Poche.tts.TtsFragment.lambda$pE4D3h7xYXSnhDm9IikwqXpoD6Q (Unknown Source)
  at fr.gaulupeau.apps.Poche.tts.-$$Lambda$TtsFragment$pE4D3h7xYXSnhDm9IikwqXpoD6Q.run (Unknown Source:2)

One report.