Could not copy file.
/home/content/38/7184638/html/wp-content/themes/SEWS_theme/img/border.png
because there is no file border.png. Maybe it is not included in the zip file. Or there was errors while unzipping the zip archive.
The directory in the errpor message is ‘wp-content/upgrade/’, so I think you do not upload and install a theme, you try to update a already installed theme. WordPress first unzip the theme from the zip archive into a directory (wp-content/upgrade/) and then copy the files into the theme directory.
Download the zip archive and check it manually. Try to delete the old theme (backup first!) with FTP and then upload and install the new version.