Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8da10f044ff03fb2d42f0c224db042f1ffc0412c59da35b1ac12c019d8d4b6bf:28:28
   |
28 |                             self.modifierRef.markAttendance(currentNFT: self.currentNFT, attendance: "true")    
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
   --> 1e3c78c6d580273b.LNVCT:295:34