WordPress Import shows an error when uploading previously exported xml file

First time I faced this problem & trying to find out solution but it seems to me that it happens very few and that is why no more solution has been found like this & that is why I am here.

WordPress Import Message:

File is empty. Please upload something more
substantial. This error could also be caused by uploads being disabled
in your php.ini or by post_max_size being defined as smaller than
upload_max_filesize in php.ini.

I am getting above message when trying to import a previously imported file like the bellow image. Could you please tell me how to solve this?

I already tried to find the solution by googling but could not yet?

You need to increase the upload limit in your php.ini.

To increase the maximum upload file size, open your php.ini file in the “xampp/php/php.ini” directory. search for upload_max_filesize and increase the value like :

upload_max_filesize = 128M