fix

wp-content/plugins/robin-image-optimizer/libs/addons/uninstall.php

@@ -0,0 +1,22 @@
+<?php
+
+// if uninstall.php is not called by WordPress, die
+if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
+	die;
+}
+
+// remove plugin options
+global $wpdb;
+
+// Main plugin file, to have files included file deleting WebP folder
+/*
+require_once( dirname( __FILE__ ) . '/robin-image-optimizer.php' );
+
+if ( class_exists( 'WRIO_WebP_Api' ) ) {
+	// Unlink WebP dir
+	$path = WRIO_WebP_Api::get_base_dir_path();
+
+	if ( file_exists( $path ) ) {
+		@unlink( $path );
+	}
+}*/