Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> abc1972e8bbad9609b70189301bbd8355fb46325a75eb5eb9b75998913a33bca:28:28
   |
28 |                             self.modifierRef.markAttendance(currentNFT: self.currentNFT, attendance: "true")    
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
   --> 1e3c78c6d580273b.LNVCT:295:34
    |
295 |             let ref2 =  currentNFT!
    |                                   ^