Jats to EPUB transformation scenario does not work

[raducoravu]

We got this feedback:

I went to run the ePub conversion (oxygen 23, mac Big Sur) but I get a message that Calabash XProc is no longer available and I should reconfigure the transformation scenario. 

At some point we changed the name of the XProc engine used by Oxygen but we forgot to update its name in the pre-configured "JATSKit - NISO JATS / NLM BITS - EPUB" transformation scenario.

[raducoravu]

There are several problems here:

1. Edit the pre-configured "JATSKit - NISO JATS / NLM BITS - EPUB" transformation scenario and change its engine name.

2. After this if I publish I get this error, meaning there are extra errors in the XProc:

   System ID: /Users/name/Desktop/Oxygen XML Editor/frameworks/jats/lib/xproc/jatskit-epub3-produce.xpl
   Scenario: JATSKit - NISO JATS / NLM BITS - EPUB
   XProc file: /Users/name/Desktop/Oxygen XML Editor/frameworks/jats/lib/xproc/jatskit-epub3-produce.xpl
   Document type: JATSKit - NISO JATS / NLM BITS
   Engine name: Add-on for Calabash XProc Engine
   Severity: error
   Description: Template xsl:initial-template does not exist