Line 4139 of post.php in WP 6.2 branch has the error message, Content, title, and excerpt are empty.. Reviewing the previous lines of code, it should be excluded for attachments, but there may be a callback applied to the wp_insert_post_empty_content filter which is requiring attachments to also have content, title, and excerpt.
Use Query Monitor or search your codebase for uses of the wp_insert_post_empty_content filter. If none are found, then you can use the second parameter of the filter to restore core functionality on the filter (untested):
add_filter( 'wp_insert_post_empty_content', static function ( $maybe_empty, $postarr ) {
$post_type = empty( $postarr['post_type'] ) ? 'post' : $postarr['post_type'];
$post_title = $postarr['post_title'];
$post_content = $postarr['post_content'];
$post_excerpt = $postarr['post_excerpt'];
return 'attachment' !== $post_type
&& ! $post_content && ! $post_title && ! $post_excerpt
&& post_type_supports( $post_type, 'editor' )
&& post_type_supports( $post_type, 'title' )
&& post_type_supports( $post_type, 'excerpt' );
}, 9999, 2 );