Use this function or something similar to change the image editor it is using. This will often fix media library image upload problems. Helpful resources: https://developer.wordpress.org/reference/hooks/wp_image_editors/ https://developer.wordpress.

wp_change_img_editor

///////////////////////
// CHANGE IMG EDITOR //
///////////////////////

function landbryo_img_edit($array) {
  return array( 'WP_Image_Editor_GD', 'WP_Image_Editor_Imagick' );
}
add_filter( 'wp_image_editors', 'landbryo_img_edit' );