While uploading the files .pptx and .ppt files from WordPress admin dashboard, I was getting the error as below –

Solution –

1. Please check the files and directories permission. File permission should be 644 and directory permission should be 755. You can fire below command under cPanel >> File Manager >> public_html to correct the permission –

find . -type d -exec chmod 755 {} ;
find . -type f -exec chmod 644 {} ;

2. Please check the .htaccess file (under cPanel >> File Manager >> public_html ), there should be ‘ppt‘ and ‘pptx‘ extension should be enabled. Below is the code for you which you should add in .htaccess file –

Order deny,allow
Deny from all
<Files ~ “.(pdf|csv|doc|docx|jpe?g|png|gif|ppt|pptx)$”>
Allow from all
</Files>

It resolved my issue!