Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 17ca7d3b5f2bd95dd5d968773f0bd9a704ca5a0b9b92a2c003ad9a9f68bfcc7b:28:28
   |
28 |                             self.modifierRef.markAttendance(currentNFT: self.currentNFT, attendance: "true")    
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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