POKE 47426,24 and use COPYA to get a copy of the original disk.
Another nibble count protection, see how to kill this pesky routine.

Use a disk editor and look at:

track $00 sector $07 byte $C1 change $38 - CLC to $18 - SEC
          sector $08 byte $63 change $BD $88 $C0 - LDA $C088,X to $EA $EA $60 - NOP NOP RTS