File Upload Validation Error

Hello

We have used GTranslate plugin on our site for translate the page in multilanguage. If we translate the page then the File upload field*(required) does not work. it shows a validation error msg(This field cannot be blank.) after uploading attachments and the form does not submit. no matter how many times I upload attachment it shows “This field cannot be blank” msg

Normally when we translate the page the site page path has changed domain.com/page/ to
domain.com/es/page/ . the form worked perfectly on domain.com/page/ this page but does not worked on domain.com/es/page/

Please help and guide us

Thanks,
Soumya