Crashlytics: ACProgressFlower.java line 54 cc.cloudist.acplibrary.ACProgressFlower$2.run

[b9145]

I faced too many crashes on this line. Can anyone help?

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void l1.b(int)' on a null object reference
       at cc.cloudist.acplibrary.ACProgressFlower$2.run(ACProgressFlower.java:54)
       at java.util.TimerThread.mainLoop(TimerThread.java:562)
       at java.util.TimerThread.run(TimerThread.java:512)

Devices

• Galaxy A8(2018)
• Redmi Note 7 Pro
• Galaxy S7
• Galaxy S9
• OnePlus HD1901
• Galaxy S8
• Pixel 2 XL
• HUAWEI P8 lite 2017
• ONEPLUS A3003

at 0% background.