With a minimum of support from your side I could be able to report this bug more correctly, unfortunately it only appears for a few seconds at boot after updating Grub (and from that little I can read in those few seconds) would seem to have some problems with FAT filesystem type Surely you know fedora much better than it is, so I hope for some terminal suggestions to report the problem more adequately so that it can be more useful for you too!!!
If you suggest a couple of commands maybe I can better identify the problem and report it more correctly!!!
*** This bug has been marked as a duplicate of bug 1699761 ***
ttps://bugzilla.redhat.com/show_bug.cgi?id=1699761 In fact BUG has been more correctly reported to the following link!!!!