我也遇到了，自己测试没问题，线上用户发生了，暂时不知道为啥，我的使用比较简单，就是用于选取用户的头像。

java.lang.RuntimeException:Unable to start activity ComponentInfo{com.zookzone.chat/com.yalantis.ucrop.UCropMultipleActivity}: java.lang.IllegalArgumentException: Missing required parameters, count cannot be less than 1
2
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
3
......
4
Caused by:
5
java.lang.IllegalArgumentException:Missing required parameters, count cannot be less than 1
6
com.yalantis.ucrop.UCropMultipleActivity.initCropFragments(UCropMultipleActivity.java:111)
7
com.yalantis.ucrop.UCropMultipleActivity.onCreate(UCropMultipleActivity.java:97)
8
android.app.Activity.performCreate(Activity.java:7009)
9
android.app.Activity.performCreate(Activity.java:7000)
10
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
11
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
12
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
13
android.app.ActivityThread.-wrap11(Unknown Source:0)
14
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
15
android.os.Handler.dispatchMessage(Handler.java:106)
16
android.os.Looper.loop(Looper.java:164)
17
android.app.ActivityThread.main(ActivityThread.java:6494)
18
java.lang.reflect.Method.invoke(Native Method)
19
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
20
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

`class ImageCropEngine : CropFileEngine {

override fun onStartCrop(
    fragment: Fragment, srcUri: Uri, destinationUri: Uri, dataSource: java.util.ArrayList<String>?, requestCode: Int
) {
    val options = Options()
    options.withAspectRatio(1.toFloat(), 1.toFloat())

    val uCrop = UCrop.of(srcUri, destinationUri, dataSource)
    uCrop.withOptions(options)
    uCrop.setImageEngine(object : UCropImageEngine {
        override fun loadImage(context: Context, url: String, imageView: ImageView) {
            if (!ActivityCompatHelper.assertValidRequest(context)) {
                return
            }
            val target = ImageRequest.Builder(context).data(url).target(imageView).build()
            context.imageLoader.enqueue(target)
        }

        override fun loadImage(
            context: Context, url: Uri, maxWidth: Int, maxHeight: Int, call: OnCallbackListener<Bitmap>
        ) {
            val loader = ImageLoader(context)
            val request = ImageRequest.Builder(context).data(url).target(onSuccess = { result: Drawable ->
                val bitmap = result.toBitmap()
                call.onCall(bitmap)
            }, onError = { _: Drawable? ->
                call.onCall(null)
            }).build()

            loader.enqueue(request)
        }
    })
    uCrop.start(fragment.requireActivity(), fragment, requestCode)
}

}
`