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My VM is not starting, with the following errors in logs. Attached full logs

00:00:08.498941 VMMDev: Guest Log: BIOS: KBD: unsupported int 16h function 03
00:00:08.499096 VMMDev: Guest Log: BIOS: AX=0305 BX=0000 CX=0000 DX=0000
00:00:08.507579 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=83
00:00:08.507779 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=83
00:00:08.507991 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=84
00:00:08.508188 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=84
00:00:08.508399 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=85
00:00:08.508596 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=85
00:00:08.508865 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=86
00:00:08.509064 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=86
00:00:08.509277 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=87
00:00:08.509474 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=87
00:00:08.509685 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=88
00:00:08.509883 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=88
00:00:08.510094 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=89
00:00:08.510290 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=89
00:00:08.510499 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8a
00:00:08.510696 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8a
00:00:08.510906 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8b
00:00:08.511102 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8b
00:00:08.511312 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8c
00:00:08.511509 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8c
00:00:08.511719 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8d
00:00:08.511915 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8d
00:00:08.512123 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8e
00:00:08.512319 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8e
00:00:08.512529 VMMDev: Guest Log: int13_harddisk_ext: function 41, unmapped device for ELDL=8f
00:00:08.512728 VMMDev: Guest Log: int13_harddisk: function 02, unmapped device for ELDL=8f

5.0.38? Time to upgrade?

That aside, I don't see any sign of an error in the log, perhaps because it just terminates suddenly. I suspect the log is incomplete (you need to close the software before copying files it had open for writing). If that is not the answer then something on the host changed.

p.s. In future please provide logs as compressed attachments, e.g. zip, rar, gzip.