could you make it for customers?

Hi,

I made it work on a front-end page and for all types of members, administrators or not.

front-end page and non-admin are 2 distincts problems.

for front-end page, please see the precedent message : https://wordpress.org/support/topic/crop-broken-brings-up-opaque-screen?replies=5

Then for non-admin, the problem isn’t specific to this plugin but first to the use of the wordpress media uploader in the front-end, and second to allow your members to upload files.

for the first problem, I had to manually add wp_enqueue_media() in order to show the media uploader (only for non-admin, I don’t know why) in functions.php

function load_wp_media_files() {
  // add a specific condition to select the pages the media uploader must appear
  	wp_enqueue_media();
}
add_action( 'wp_enqueue_scripts', 'load_wp_media_files' );

for the second problem, it relates to roles and capabilities. Your customer is certainly a member of your site, you must verify his role has the capability “upload_files”, and if not add it :
for instance, with the subscriber role :

function add_theme_caps() {
    // gets the subscriber role
    $role = get_role( 'subscriber' );

    // This only works, because it accesses the class instance.
    // would allow the subscriber to upload media for current theme only
    $role->add_cap( 'upload_files' );
}
add_action( 'init', 'add_theme_caps');

With these little tricks, I’ve been able to have ACF crop image working on a front-end page and for all types of members.

Hope this can help!