使用idea插件新建一个bpm文件之后报错not supp

1. 新建一个bpm文件之后，任意点击process-flow或Text，都会附件所示错误，
2. 在process-flow页面编辑修改之后，Text页面内容无变化，仍然是附件所示错误，我的电脑是idea1903，开始以为是idea版本问题，后面更换为2003之后发现还是这样的。。

Start by reproducing the error in the IDEA plugin with a newly created BPM file on IDEA 2019.3 and 2020.3, then inspect the process-flow and Text views mentioned in the report. Done means both views open without the reported error and Text reflects edits made in process-flow.

Written by the indexing model from the issue text.