Are you in the same situation as I was? Here is how I fixed it, and you can do it too.
Using Code
If you are comfortable editing the PHP file, then this is recommended.
Login to your WordPress server or if on shared hosting then go to cPanel » File Manager Traverse to the theme folder and add the following in functions.php file
Note: as a best practice, take a backup of the file before modifying it.
Save the file and test by logging as a contributor role. You should see the “Add media” button or ability to upload the images.
If you don’t want to touch the file, then you can use the plugin method.
Using a WP plugin
The user role editor plugin will be handy to update the permission for the contributor role.
Go to WordPress admin and install » activate the plugin
Navigate to Users » User role editor Select role as a contributor Select “upload_files” from list of the capabilities and click update
That should help contributors to add images to WordPress. I hope this helps.