Not able to save image

[suds7]

Great project i learned lots of things from this code. I'm facing small issue I'm not able to save image. When i put a sticker on image then i click next to save the image now instead of saving the image it restarts the app .When app restart in the logs it generates below message

1643-1643/com.github.skykai.stickercamera D/Event﹕ No subscribers registered for event class com.stickercamera.app.model.FeedItem
1643-1643/com.github.skykai.stickercamera D/Event﹕ No subscribers registered for event class de.greenrobot.event.NoSubscriberEvent

Translated through google translate:
我不能保存图像。当我点击旁边而不是保存的图像是通过启动摄像机菜单重新从开始应用。
Wǒ bùnéng bǎocún túxiàng. Dāng wǒ diǎnjī pángbiān ér bùshì bǎocún de túxiàng shì tōngguò qǐdòng shèxiàngjī càidān chóngxīn cóng kāishǐ yìngyòng.