Being unable to export the reports to Excel is a reported issue, rainbow300711.
If this is what you're trying to do, then you're one of the affected users. While we're working on getting this fixed, I'd suggest giving us a call. We're collating how many users are getting the same issue, so a resolution can be made immediately.
In one of your previous posts, you've mentioned you're in Vietnam. The support we offer for those who are using the international version is through email. Please send us an email if you're getting this issue, so you'll be notified when it's resolved. We'll get back to you within 24-48 hours.
You can get our phone number by following these steps: