I dont think you can read the image from the SD card once it is burnt to it. I also get the error message as soon as I plug the SD card in my computer. I follow this that I got from May at SOtM to prepare the card before I burn a new image.
I have firmaware 4.22 on my computer so if anyone wants that send me an PM with your email and I will send it over.
I have zero problems with 4.5 runing Roon and I use a 16Gb class 10 SD card and the image was done using the guide below and imageUSB.
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