A CRC error occurs because the PC adds up the bits as read (With an algorithm) and compares them to the CRC number , to see if any bits were lost.
When this error occurs, there is some bits missing from the file. This means the program will usually crash when it hits the missing bits.
I assume that the last floppy disk is the problem.
IF you have another PC, sometimes a different floppy drive, with a slightly different alignment,
((Floppy Drives are so cheaply made there is a lot of play in them, usually) ,may be able to read the disk. If so Copy and write to a new disk.
I have had this happen to OEM factory disks.
(Big company, name starts with M.)
Make sure your backups are not stored near a telephone, monitor, or electric motor.
Regards, Chris