Dear @esciencepress
You problem deals with your meta-data. In the article “First Report of Botrytis cinerea Causing Gray Mold Disease on Peach from Pakistan” defined only start page, end page is empty. Please fix this.
For further problem with uploading please use on-line validation tools.
https://www.freeformatter.com/xml-validator-xsd.html
To prettify xml file, please use on-line tool Free Online XML Formatter - FreeFormatter.com .
xsd scheme available by link https://journals.indexcopernicus.com/ic-import.xsd
It helps you to understand where is the problem.