Using 3.5.8271 P
This error only occurs when Group By Album Artist is selected and then unticking 'show header in separate row.'
If Group By Artist is selected then no error is thrown when unticking the header option.
MusicBee v3.5.8271.36235P (Win10.0), 24 Aug 2022 14:04:
System.NullReferenceException: Object reference not set to an instance of an object.
at #=zhWkiOYVAEBaUuTlbKgOUUzcJYpm6.#=zystkm2TmSrVhdqsGhA==.#=zNkFCPX6XiUFEkQgfq8wrHuQ=.#=zXMjdA1uCrg3y6U0feQ==(Boolean #=zn4AiTHo56Os7)
at #=zhWkiOYVAEBaUuTlbKgOUUzcJYpm6.#=zystkm2TmSrVhdqsGhA==.#=zNkFCPX6XiUFEkQgfq8wrHuQ=.#=zHTfIJ8SmdJzayYHkJg==(Object #=zs6SenPs=, EventArgs #=zQhPEl3k=)
at System.Windows.Forms.Timer.OnTick(EventArgs e)
at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
sort by album, group by artist or album artist, untick "show header in separate row". restart mb, it may be important! you will see black squares for empty artworks instead of placeholder images. click on any album (but not on "play" button of album), which doesn't have any artwork. error message will be displayed (null reference exception):
MusicBee v3.5.8281.33217P (Win10.0), 5 сен 2022 21:00:
System.NullReferenceException: Ссылка на объект не указывает на экземпляр объекта.
в #=zfmEiYLUoQSKymI9Z$RcWIe4OyM47.#=zzaGLg8BHnV7l$iR18w==.#=zG9cRqfIMcF8KHLYQn$oDeLA=.#=zoCKfmwz3VDw7OF6RqLxSl92E8OeV()
в #=zfmEiYLUoQSKymI9Z$RcWIe4OyM47.#=zzaGLg8BHnV7l$iR18w==.#=zG9cRqfIMcF8KHLYQn$oDeLA=.#=z9Ps1vCPD0q4ZLLUQzA==.#=zK4$LDQ6shK4P(Boolean #=zzsLJjkQzoX5K, Boolean #=zIyf05bKqydXCCHKVYA==, Boolean #=zCeKsPg1btTgIwBK7aw==)
в #=zfmEiYLUoQSKymI9Z$RcWIe4OyM47.#=zzaGLg8BHnV7l$iR18w==.#=zG9cRqfIMcF8KHLYQn$oDeLA=.#=z_sn4GDODtSrq(Int32 #=zbQnx3ws=, Boolean #=zOKeNNNzIygLL, #=zoOI1RKg= #=zYP9ApMCvA3Dp, Boolean #=zg3dhzYSzIOld)
в #=zfmEiYLUoQSKymI9Z$RcWIe4OyM47.#=zzaGLg8BHnV7l$iR18w==.#=zG9cRqfIMcF8KHLYQn$oDeLA=.#=z5VQCsoBU3JDnJM7N7g==(Point #=zG8cGeuE=)
в #=zfmEiYLUoQSKymI9Z$RcWIe4OyM47.#=zzaGLg8BHnV7l$iR18w==.#=zG9cRqfIMcF8KHLYQn$oDeLA=.OnMouseDown(MouseEventArgs #=zzWv04zI=)
в System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
в System.Windows.Forms.Control.WndProc(Message& m)
в #=z9pY_zgSwCJ4MhF0mLLp2mhg=.WndProc(Message& #=zt3d322U=)
в System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
в System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
в System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
sorry for posting it here rather than in bug reports board. it seems that this topic is more appropriate.