Pipeline deployment failed with 'ECS Deployment Circuit Breaker was triggered' error

Hi, I made some code changes and deployed them to a pipeline but it failed in beta. I found this error in the CloudFormation logs:

Resource handler returned message: "Error occurred during operation 'ECS Deployment Circuit Breaker was triggered'." (RequestToken: f6d04141-b823-da53-e941-7a4030747a7e, HandlerErrorCode: GeneralServiceException)

There is also a null pointer exception in the cloud watch service logs

10 Apr 2023 20:06:06,477 [ERROR]  (localhost-startStop-1) org.apache.catalina.core.StandardContext: One or more listeners failed to start. Full details will be found in the appropriate container log file
10 Apr 2023 20:06:06,485 [ERROR]  (localhost-startStop-1) org.apache.catalina.core.StandardContext: Context [Service] startup failed due to previous errors
10 Apr 2023 20:06:06,487 [ERROR]  (localhost-startStop-1) org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[Service]: Exception sending context destroyed event to listener instance of class [com.amazon.arest.guice.ARestContextListener]
java.lang.NullPointerException
	at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.triggerAnnotatedMethods(GuiceResteasyBootstrapServletContextListener.java:150)
	at org.jboss.resteasy.plugins.guice.GuiceResteasyBootstrapServletContextListener.contextDestroyed(GuiceResteasyBootstrapServletContextListener.java:145)
	at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5172)
	at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5865)
	at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:257)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:187)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1689)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1679)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at software.amazon.disco.agent.concurrent.decorate.DecoratedRunnable.run(DecoratedRunnable.java:112)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at software.amazon.disco.agent.concurrent.decorate.DecoratedRunnable.run(DecoratedRunnable.java:112)
	at java.base/java.lang.Thread.run(Thread.java:829)

What is the cause of these errors? Is the null pointer exception caused by the CloudFormation error or vice versa?