I implemented the Ex2, Tutorial Energyplus 9.1. But I met this error. I dont know how to fix it. Could you please give me a recommendation for solving this type of error?

---------------------Err report------------------
Program Version,EnergyPlus, Version 9.1.0-08d2e308bb, YMD=2019.06.28 22:57,
   ************* Beginning Zone Sizing Calculations
   ************* Beginning System Sizing Calculations
   ** Warning ** ManageSizing: For a plant sizing run, there must be at least 1 Sizing:Plant object input. SimulationControl Plant Sizing option ignored.
   ** Severe  ** AirLoopHVAC:Unitary:Furnace:HeatCool = ZONE UNITARY FURNACE WITH DX COOLING
   **   ~~~   ** Illegal Supply Air Fan Operating Mode Schedule Name = CONTINUOUS
   **  Fatal  ** Errors found in getting Furnace or Unitary System input.
   ...Summary of Errors that led to program termination:
   ..... Reference severe error count=1
   ..... Last severe error=AirLoopHVAC:Unitary:Furnace:HeatCool = ZONE UNITARY FURNACE WITH DX COOLING
   ************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
   ************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.
   ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
   ************* EnergyPlus Sizing Error Summary. During Sizing: 1 Warning; 0 Severe Errors.
   ************* EnergyPlus Terminated--Fatal Error Detected. 1 Warning; 1 Severe Errors; Elapsed Time=00hr 00min  0.52sec