Tasklist app web page is blank - Invalid character found in method name exception

I running C8 (v8.1.8) using the following Docker compose project: GitHub - camunda/camunda-platform: Camunda Platform 8

I am running the core stack using the following command: docker-compose -f docker-compose-core.yaml up -d

I can see the Operate web app no problem, but when I try and load the Tasklist app I get a totally blank web page. In the Docker logs, I see the following exception:

tasklist         | java.lang.IllegalArgumentException: Invalid character found in method name [0x160x030x010x020x000x010x000x010xfc0x030x030xf00xccO0x88zv0xb0^K0x860xfc0x110x9d/0x910x8c0xf4qT4t0xb30x8c0xe70xc9V0x0f0xa90x8b0xca0x090x17 ]. HTTP method names must be tokens
tasklist         | 	at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:419) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:271) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.69.jar:9.0.69]
tasklist         | 	at java.lang.Thread.run(Unknown Source) ~[?:?]

Any ideas? Thanks in advance.

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Hi @Justin_Phillips. Please join the Camunda 8 slack group, we are currently discussing this issue in the #tasklist channel.

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I also met the same problem, can you write down the solution here, thanks @Justin_Phillips

I face the same problem. Can someone post the solution here?

There is an impending fix for this. See the following Slack thread for the latest: Slack

Is there a workaround for completing user tasks while it gets fixed? For example for performing the steps in this tutorial: GitHub - camunda/camunda-platform-get-started: Camunda Platform 8 - Get Started Projects

I have tested this with 8.1.9 and it is fixed.