Set a breakpoint at the start of microflow IVK_ImportTemplateDocument to get more details on the error. Share some screenshots in this post, making it easier for us to understand.
Also make sure that the data is correct, the template is well-defned, and the modelreflection is up-to-date.
I remove org.apache.commons.io-2.3.0.jar
and commons-io.commons-io-2.11.0.jar
and it worked for me.