Hello
I installed Jenkins "jenkins-2.47-1.1.noarch" on CentOS 7, to test locally email notification. It has the plugin Email Extension plugin v. 2.57.

I followed the instruction in the documentation and also in a previous issue that was describing how to use jelly template, but I was still getting all the time this error:
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script1.groovy: 4: unexpected token: in @ line 4, column 36.
Jelly file [foobar] was not found in $JENKINS_HOME/email-templates.

What I did so far is the following:
1. Create manually a directory $JENKINS_HOME/email-templates because it was missing.
2. Create a file "foobar.jelly" under $JENKINS_HOME/email-templates and set mod to 777 to be sure that I don't have access right issue.
3. Set "Default Pre-send Script" to ${JELLY_SCRIPT,template="foobar"}
4. Create job and use $DEFAULT_PRESEND_SCRIPT in field "Pre-send Script".
5. and finally run the build.

Note: After searching for similar issues and proposed solutions, I also tried to use the full file name ${JELLY_SCRIPT,template="foobar.jelly"}, and tried the same thing with Groovy template ${SCRIPT,template="cust"}, where I created "$JENKINS_HOME/email-templates/cust.groovy" but I was always getting the same error.

Any suggestions or did I do anything wrong?
Thank you