This could happen because of 2 reasons:
-
The DVD+R is not supported by the application, which I doubt this is the case.
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The DVR+R is not supported by your DVD-RW device which is more plausible.
If you have the possibility, get the model make and number of your DVD-RW device and paste it on Google to see all the supported DVDs, then you can replace it as necessary. I've encountered this issue as well and I had to replace the device to burn certain discs (DVD+R DL).