I used the source code from iDempiere.
- Running mvn validate is successful.
- Run mvn verify successfully.
- Import source into eclipse is successfully.
- Run file install.app is successfully.
- When run file server.app it will be fail.
- Run url
http://localhost:8080/webui/failed.

It sounds like maybe you installed iDempiere on top of a JPiere database?
JPiere is a japanese distro of iDempiere, your error message is pointing to the error that jpiere theme is not installed.
For iDempiere vanilla is better to follow fresher instructions from here: https://wiki.idempiere.org/en/Installing_iDempiere
I can't assess about the accuracy of the link you provided as is in japanese - but I see it mentions Eclipse201909. For running fine the latest version you need Eclipse201912 instead.