ImageMagick.MagickCoderErrorException: WriteBlob Failed

[LANSELOT]

I can't save .png image in Ubuntu

...
try
            {
                using (var image = MagickImage(base64Bytes))
                {
                    image.Write(res); // exception here
                }
            }
...

ImageMagick.MagickCoderErrorException: WriteBlob Failed `/storage/watermark/35346472-99c6-4863-98b0-9f9409329296.png' @ error/png.c/MagickPNGErrorHandler/1715

I used library Magick.NET-Q8-x64.dll

P.S. Write permissions were previously set

[dlemstra]

Is it possible to create a small program that demonstrates the issue?