[legacy] flap breaks

[Yedelo]

first launch:

java.lang.RuntimeException: Failed to remap jar
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.TrRemapperHelper.applyRemapper(TrRemapperHelper.java:75) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.ModTrRemapper.remapMods(ModTrRemapper.java:99) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.context.ModRemmaperV2Context.remapMods(ModRemmaperV2Context.java:85) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.context.ModRemmaperV2Context.discoverMods(ModRemmaperV2Context.java:133) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.ModVariantRemapper.doRemap(ModVariantRemapper.java:176) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.ModVariantRemapper.transformModCandidatesFabric(ModVariantRemapper.java:106) ~[flap-0.0.5.jar:0.0.5]
    at net.fabricmc.loader.impl.FabricLoaderImpl.setup(FabricLoaderImpl.java:238) ~[fabric-loader-0.19.5.jar:?]
    at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:199) ~[fabric-loader-0.19.5.jar:?]
    at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:142) ~[fabric-loader-0.19.5.jar:?]
    at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:66) ~[fabric-loader-0.19.5.jar:?]
    at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.19.5.jar:?]
    at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:115) ~[NewLaunch.jar:?]
    at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) ~[NewLaunch.jar:?]
    at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) ~[NewLaunch.jar:?]
Caused by: java.lang.RuntimeException: Error while remapping access widener for 'oneconfigv1'
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.ModTrRemapper.lambda$getRemapperConsumer$2(ModTrRemapper.java:141) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.TrRemapperHelper.applyRemapper(TrRemapperHelper.java:65) ~[flap-0.0.5.jar:0.0.5]
    ... 13 more
Caused by: net.ornithemc.flap.lib.classtweaker.reader.ClassTweakerFormatException: Unsupported class tweaker format: v2
    at net.ornithemc.flap.lib.classtweaker.reader.ClassTweakerReaderImpl.readHeader(ClassTweakerReaderImpl.java:209) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.classtweaker.reader.ClassTweakerReaderImpl.readHeader(ClassTweakerReaderImpl.java:169) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.classtweaker.api.ClassTweakerReader.readHeader(ClassTweakerReader.java:50) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.ModTrRemapper.remapAccessWidener(ModTrRemapper.java:152) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.ModTrRemapper.lambda$getRemapperConsumer$2(ModTrRemapper.java:135) ~[flap-0.0.5.jar:0.0.5]
    at net.ornithemc.flap.lib.modremappingapi.impl.remapper.TrRemapperHelper.applyRemapper(TrRemapperHelper.java:65) ~[flap-0.0.5.jar:0.0.5]
    ... 13 more

second launch (even when oneconfig is disabled) (this one seems to stick):

[15:40:21] [main/ERROR]: Failed to set up Flap! Some mods may not work correctly.
java.lang.NullPointerException: Cannot invoke "String.equals(Object)" because the return value of "java.util.jar.Attributes.getValue(String)" is null
	at net.ornithemc.flap.lib.crossremapper.FabricModRemapper.lambda$checkCachedCandidatesForSkip$1(FabricModRemapper.java:100) ~[flap-0.0.5.jar:0.0.5]
	at java.util.stream.MatchOps$1MatchSink.accept(MatchOps.java:90) ~[?:?]
	at java.util.HashMap$EntrySpliterator.tryAdvance(HashMap.java:1880) ~[?:?]
	at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:147) ~[?:?]
	at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:588) ~[?:?]
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:574) ~[?:?]
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:560) ~[?:?]
	at java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:230) ~[?:?]
	at java.util.stream.MatchOps$MatchOp.evaluateSequential(MatchOps.java:196) ~[?:?]
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:265) ~[?:?]
	at java.util.stream.ReferencePipeline.allMatch(ReferencePipeline.java:673) ~[?:?]
	at net.ornithemc.flap.lib.crossremapper.FabricModRemapper.checkCachedCandidatesForSkip(FabricModRemapper.java:94) ~[flap-0.0.5.jar:0.0.5]
	at net.ornithemc.flap.lib.crossremapper.FabricModRemapper.collectSubRemappers(FabricModRemapper.java:80) ~[flap-0.0.5.jar:0.0.5]
	at net.ornithemc.flap.lib.modremappingapi.impl.context.ModRemmaperV2Context.discoverMods(ModRemmaperV2Context.java:111) ~[flap-0.0.5.jar:0.0.5]
	at net.ornithemc.flap.ModVariantRemapper.doRemap(ModVariantRemapper.java:176) ~[flap-0.0.5.jar:0.0.5]
	at net.ornithemc.flap.ModVariantRemapper.transformModCandidatesFabric(ModVariantRemapper.java:106) ~[flap-0.0.5.jar:0.0.5]
	at net.fabricmc.loader.impl.FabricLoaderImpl.setup(FabricLoaderImpl.java:238) ~[fabric-loader-0.19.5.jar:?]
	at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:199) ~[fabric-loader-0.19.5.jar:?]
	at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:142) ~[fabric-loader-0.19.5.jar:?]
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:66) ~[fabric-loader-0.19.5.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.19.5.jar:?]
	at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:115) ~[NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) ~[NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) ~[NewLaunch.jar:?]

i found META-INF/jars/1.8.9-ornithe-1.1.15.jar/oneconfigv1.classtweaker that has classTweaker v2 intermediary
but i'm not sure where this class tweaker is from