Can't upload

It keeps saying while I'm 100% it's a zip file

Please review the following issues that occurred:
Main File(s) must be a ZIP file

We're changing some settings in the site. Please, try to upload tomorrow.

@FlashBlue Same Problem Occurs with me ?

"Please review the following issues that occurred:

Main File(s) must be a ZIP file
"
It keeps saying while I'm 100% sure it's a zip file!
Regards,
ThemesEngineer!

Please, check your Flash Player version or zip files by WinRAR or WinZip.

I have uploaded few money codegrape , it's not added on my account .....

Your deposit is complete. You can start buying.