Export excel error

What is the problem? Please be detailed.
I can not export excel data from ODK server.

What ODK tool and version are you using? And on what device and operating system version?
Lasted version

What steps can we take to reproduce the problem?

What you have you tried to fix the problem?
Export excel has error in ODK .

Anything else we should know or have? If you have a test form or screenshots or logs, attach here.
I want to know what the problem is occurring in ODK server. So please kindly to solution for me.