Flink Dashboard stops showing list of uploaded jars if main method cannot be looked up

java.lang.RuntimeException: Failed to fetch jar list: Could not look up the main(String[]) method from the class de.zalando.[...]]: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
at org.apache.flink.runtime.webmonitor.handlers.JarListHandler.handleRequest(JarListHandler.java:122)
at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.respondAsLeader(RuntimeMonitorHandler.java:135)
at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.channelRead0(RuntimeMonitorHandler.java:112)
at org.apache.flink.runtime.webmonitor.RuntimeMonitorHandler.channelRead0(RuntimeMonitorHandler.java:60)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
at io.netty.handler.codec.http.router.Handler.routed(Handler.java:62)
at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:57)
at io.netty.handler.codec.http.router.DualAbstractHandler.channelRead0(DualAbstractHandler.java:20)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:104)
at org.apache.flink.runtime.webmonitor.HttpRequestHandler.channelRead0(HttpRequestHandler.java:65)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:242)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:147)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:339)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:324)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:847)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Could not look up the main(String[]) method from the class de.zalando.[...]]: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
at org.apache.flink.client.program.PackagedProgram.hasMainMethod(PackagedProgram.java:479)
at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:216)
at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:147)
at org.apache.flink.runtime.webmonitor.handlers.JarListHandler.handleRequest(JarListHandler.java:103)
... 30 more
Caused by: java.lang.NoClassDefFoundError: org/shaded/apache/flink/streaming/api/functions/source/SourceFunction
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at org.apache.flink.client.program.PackagedProgram.hasMainMethod(PackagedProgram.java:473)
... 33 more
Caused by: java.lang.ClassNotFoundException: org.shaded.apache.flink.streaming.api.functions.source.SourceFunction
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 39 more