Revit System Analysis

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I am using Revit to try and run a Systems Analysis, but I get the following error:

[11:31:05.171456 ERROR] undefined method `setMinimumSystemAirFlowRatio' for #<OpenStudio::Model::SizingSystem:0x00000288e5735210>
C:/PROGRA~1/NREL/OPENST~1/measures/gbxml_hvac_import/resources/air_system.rb:200:in `add_air_loop_hvac'
C:/PROGRA~1/NREL/OPENST~1/measures/gbxml_hvac_import/resources/air_system.rb:141:in `build'
C:/PROGRA~1/NREL/OPENST~1/measures/gbxml_hvac_import/resources/model_manager.rb:90:in `map'
C:/PROGRA~1/NREL/OPENST~1/measures/gbxml_hvac_import/resources/model_manager.rb:90:in `build'
C:/PROGRA~1/NREL/OPENST~1/measures/gbxml_hvac_import/measure.rb:69:in `run'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/util/measure.rb:517:in `apply_measure'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/util/measure.rb:114:in `block in apply_measures'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/util/measure.rb:67:in `each_index'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/util/measure.rb:67:in `apply_measures'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/jobs/run_os_measures.rb:70:in `perform'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/run.rb:291:in `step'
:/ruby/2.7.0/gems/openstudio-workflow-2.3.1/lib/openstudio/workflow/run.rb:233:in `run'
:/openstudio_cli.rb:1184:in `execute'
:/openstudio_cli.rb:814:in `execute'
:/openstudio_cli.rb:1983:in `<main>'
eval:188:in `eval'
eval:188:in `require_embedded_absolute'
eval:173:in `block in require_embedded'
eval:167:in `each'
eval:167:in `require_embedded'
eval:126:in `require'
eval:3:in `<main>'

Thanks