Help needed installing james-server-jpa-guice

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Didn't get very far in trying to install and run the jpa-guice version 
of the Apache James server! I downloaded the software from

https://www.apache.org/dyn/closer.lua/james/server/3.8.2/james-server-jpa-guice.zip

I am following the instructions at 
https://james.apache.org/server/install/guice-jpa.html except for the 
Maven compilation steps.

When I tried to execute and run james, following the instructions 
exactly, it fails -

> quasar:/mail/apache-james-3.8/james-server-jpa-guice #java 
> -javaagent:james-server-jpa-guice.lib/openjpa-4.1.1.jar \
> >     -Dlogback.configurationFile=conf/logback.xml \
> >     -Djdk.tls.ephemeralDHKeySize=2048 \
> >     -Dworking.directory=. \
> >     -jar james-server-jpa-app.jar
> Error opening zip file or JAR manifest missing : 
> james-server-jpa-guice.lib/openjpa-4.1.1.jar
> Error occurred during initialization of VM
> agent library failed to init: instrument
>
I then noted that the version of openjpa, supplied in the dowloaded zip 
file, was openjpa-3.2.jar

> quasar:/mail/apache-james-3.8/james-server-jpa-guice #ll 
> james-server-jpa-app.lib/openjpa*
> -rw------- 1 james mail 4790420 May 10  2021 
> james-server-jpa-app.lib/openjpa-3.2.0.jar
>
so on a hunch I tried running james with that version -

> quasar:/mail/apache-james-3.8/james-server-jpa-guice #java 
> -javaagent:james-server-jpa-guice.lib/openjpa-3.2.0.jar \
> >     -Dlogback.configurationFile=conf/logback.xml \
> >     -Djdk.tls.ephemeralDHKeySize=2048 \
> >     -Dworking.directory=. \
> >     -jar james-server-jpa-app.jar
> Error opening zip file or JAR manifest missing : 
> james-server-jpa-guice.lib/openjpa-3.2.0.jar
> Error occurred during initialization of VM
> agent library failed to init: instrument
>
I dunno what to try next, can some kind guru show me the way to 
nirvana?   Marc...

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