After a recent update all commands fail, it seems to be related to changes in build parameters - the IDE sending API level that monkeybrains is not expecting.
BUILD: /Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Home/bin/java -Dfile.encoding=UTF-8 -Dapple.awt.UIElement=true -jar /Users/rasmus/Library/Application Support/Garmin/ConnectIQ/Sdks/connectiq-sdk-mac-4.0.0.preview1-2021-02-02-88ee927ab/bin/monkeybrains.jar -o /Users/rasmus/Disk/Dev/garmin/XXXX.prg -w -y /Users/rasmus/Disk/Dev/garmin/XXX/developer_key.der -d vivoactive4_sim -c 3.2.0 -f /Users/rasmus/Disk/Dev/garmin/XXXX/monkey.jungle
BUILD: ERROR: Unrecognized option: -c
BUILD: org.apache.commons.cli.UnrecognizedOptionException: Unrecognized option: -c
BUILD: at org.apache.commons.cli.Parser.processOption(Parser.java:383)
BUILD: at org.apache.commons.cli.Parser.parse(Parser.java:210)
BUILD: at org.apache.commons.cli.Parser.parse(Parser.java:88)
BUILD: at com.garmin.monkeybrains.Monkeybrains.run(Monkeybrains.java:2357)
BUILD: at com.garmin.monkeybrains.Monkeybrains.simpleMain(Monkeybrains.java:318)
BUILD: at com.garmin.monkeybrains.Monkeybrains.main(Monkeybrains.java:347)
BUILD: usage: monkeyc [-a <arg>] [-b <arg>] [-d <arg>] [-e] [--Eno-invalid-symbol] [-f
BUILD: <arg>] [-g] [-h] [-i <arg>] [-l <arg>] [-m <arg>] [-o <arg>] [-p <arg>]
BUILD: [-r] [-s <arg>] [-t] [-u <arg>] [-v] [-w] [-x <arg>] [-y <arg>] [-z
BUILD: <arg>]
BUILD: -a,--apidb <arg> API import file
BUILD: -b,--apimir <arg> API MIR file
BUILD: -d,--device <arg> Target device
BUILD: -e,--package-app Create an application package.
BUILD: --Eno-invalid-symbolDo not error when a symbol is found to be invalid
BUILD: -f,--jungles <arg> Jungle files
BUILD: -g,--debug Print debug output
BUILD: -h,--help Prints help information
BUILD: -i,--import-dbg <arg> Import api.debug.xml
BUILD: -l,--typecheck <arg> Type check [0=off, 1=gradual, 2=informative, 3=strict]
BUILD: -m,--manifest <arg> Manifest file (deprecated)
BUILD: -o,--output <arg> Output file to create
BUILD: -p,--project-info <arg>projectInfo.xml file to use when compiling
BUILD: -r,--release Strip debug information
BUILD: -s,--sdk-version <arg> SDK version to target
BUILD: -t,--unit-test Enables compilation of unit tests
BUILD: -u,--devices <arg> devices.xml file to use when compiling (deprecated)
BUILD: -v,--version Prints the compiler version
BUILD: -w,--warn Show compiler warnings
BUILD: -x,--excludes <arg> Add annotations to the exclude list (deprecated)
BUILD: -y,--private-key <arg> Private key to sign builds with
BUILD: -z,--rez <arg> Resource files (deprecated)
BUILD: Complete
Aborting launch due to failed build.