Seeing the attached in logs, looks new in 1.41, not seeing it in 1.39
```
groovy.lang.GroovyRuntimeException: Could not find matching constructor for: hudson.plugins.ec2.AmazonEC2Cloud(java.lang.String, java.lang.Boolean, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.util.ArrayList)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1732)
at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1532)
at org.codehaus.groovy.runtime.callsite.MetaClassConstructorSite.callConstructor(MetaClassConstructorSite.java:49)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235)
at init-ec2.run(init-ec2.groovy:112)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
at jenkins.util.groovy.GroovyHookScript.execute(GroovyHookScript.java:136)
at jenkins.util.groovy.GroovyHookScript.execute(GroovyHookScript.java:127)
at jenkins.util.groovy.GroovyHookScript.run(GroovyHookScript.java:110)
at hudson.init.impl.GroovyInitScript.init(GroovyInitScript.java:41)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at hudson.init.TaskMethodFinder.invoke(TaskMethodFinder.java:104)
at hudson.init.TaskMethodFinder$TaskImpl.run(TaskMethodFinder.java:175)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:296)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:1083)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:214)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```

The initialization script did not change:
def ec2_cloud = new AmazonEC2Cloud(
// String cloudName
cloud_name,
// boolean useInstanceProfileForCredentials
true,
// String credentialsId
'',
// String region
region,
// String privateKey
private_key,
// String instanceCapStr
instance_cap,
// List<SlaveTemplate> templates
[slave_template]
)

Not sure why it worked before?