the error is that when using the tracking mode as an image. in the console it shows an error and there is no preview of the target image in the editor.
error:
EntryPointNotFoundException: zappar_image_tracker_target_preview_rgba_width
Zappar.Z.ImageTrackerTargetPreviewRgbaWidth (System.IntPtr o, System.Int32 indx) (at Assets/Zappar/Scripts/Z.cs:944)
ZapparEditModeImageTarget.SetupImagePreview () (at Assets/Zappar/Scripts/ZapparEditModeImageTarget.cs:53)
ZapparEditModeImageTarget.TargetDataAvailableCallback (System.Byte[] data) (at Assets/Zappar/Scripts/ZapparEditModeImageTarget.cs:88)
Zappar.Z+d__132.MoveNext () (at Assets/Zappar/Scripts/Z.cs:530)
UnityEngine.SetupCoroutine.InvokeMoveNext (System.Collections.IEnumerator enumerator, System.IntPtr returnValueAddress) (at <8691ad7005ed4755a1828378ff0b52b1>:0)