Got the same problem, just updated my mac to the lates monterey version and minion crashing on during the loading process (I think it's getting until loading gameconfig and then crashing on loading eso addons, a bit hard to see which is the last step displayed right before crash) Note, few hours ago the same minion was working on catalina before I've upgraded the macos to monterey.
Edit: after installing jre-8u321 the 'java -jar /Applications/Minion.app/Contents/Java/Minion-jfx.jar' command works and minion does run, although the console shows some expceptions which may or may not related why it crashes, at the look of it these exceptions happen during loading addons (my guess based on the debug message before them) which is about the same step where it crashes if the app itself started.
Code:
DEBUG 2022-03-28 05:50:31,459 [Data Initialization Thread] gg.minion.controller.MinionController:detectGames(688): Skipping scan for ''WOW''.
DEBUG 2022-03-28 05:50:31,459 [Data Initialization Thread] gg.minion.controller.MinionController:detectGames(688): Skipping scan for ''ESO''.
Exception in thread "Thread-40" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)
Exception in thread "Thread-62" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)
Exception in thread "Thread-65" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)
Exception in thread "Thread-80" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)
Exception in thread "Thread-159" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)
Exception in thread "Thread-173" java.util.ConcurrentModificationException
at java.util.HashMap$Ha****erator.nextNode(HashMap.java:1473)
at java.util.HashMap$KeyIterator.next(HashMap.java:1497)
at com.sun.javafx.collections.ObservableSetWrapper$1.next(ObservableSetWrapper.java:219)
at java.util.Iterator.forEachRemaining(Iterator.java:116)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
at gg.minion.controller.InstalledPane.lambda$search$21(InstalledPane.java:332)
at java.lang.Thread.run(Thread.java:750)