Can you send a link of the game? This might be because your device being android 11 and the mod doesn't support the device. It might be in your end. It could also be because of the file being corrupted somehow. Or it also could be a bug that wasn't seen by the author.
It has been 180 days (6 months) since this question was asked and no satisfactory answer was received. Therefore, this question will be moved to the answered section.