B4X FEED [Solved: Initialize class From Starter to MAIN] xui.msgboxasyn return error java.lang.NullPointerException

[practicalsoft]

I have transformed all my modules to classes with no problems.
But in a class I have a

xui.MsgboxAsync

which returns the following error:

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.ref.WeakReference.get()' on a null object reference



In a mini project that I was testing, it does work, so I don't know how to deal with the problem. Thanks.
The reason for changing it from module to classes is to be able to better capture the waitfor and recommendations in this forum.

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