Hi Lixiaowan,
Thank you for your question.
I can confirm that your stack trace matches a bug which we had in version 3.0.7 which caused the export to throw this error and not copy the export file correctly over to the <JiraHomeDirectory>/export/projectconfigurator directory as shown in the ticket located here.
This bug was fixed in the latest version which is version 3.0.8 which was released last night.
Can I please ask you to try upgrading your instance to version 3.0.8 and then generating a new export file to see if this resolves the issue.
If this response has answered your question can you please mark it as accepted so that other users can see it is correct when searching for similar answers.
Regards,
Kristian
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Same here, any ideas?
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