Title: Uncaught SyntaxError: Invalid regular expression: /^*-+:*$/: Nothing to repeat Last modified: November 12, 2021 --- # Uncaught SyntaxError: Invalid regular expression: /^*-+:*$/: Nothing to repeat * Resolved [fdig](https://wordpress.org/support/users/fdig/) * (@fdig) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/) * Hi, * I migrated a wordpress website to another server moving files from the origin directory to the target directory, i’ve imported the db and configured the wp- config.php. * After migration yoast seo plugin doesn’t work in the articles editing page [https://ibb.co/j3fghS1](https://ibb.co/j3fghS1) * I found an error in chrome console: “Uncaught SyntaxError: Invalid regular expression:/ ^*-+:*$/: Nothing to repeat”, also tried to find if other plugins conflict with yoast using troubleshooting plugin but I didn’t find any conflicts. * Could you help me, please? Thank you, Francesco Viewing 7 replies - 1 through 7 (of 7 total) * Plugin Support [Maybellyne](https://wordpress.org/support/users/maybellyne/) * (@maybellyne) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15062036) * Hello Francesco, * We have seen this error on a few occasions. And it seems to be related to CDN implementations. Our colleague, Jannes dived into this in this [GitHub issue](https://github.com/Yoast/wordpress-seo/issues/17579) with more details. * If you do run that CDN/firewall solution, we recommend reaching out to them about this issue. * Thread Starter [fdig](https://wordpress.org/support/users/fdig/) * (@fdig) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15062191) * I don’t think the site uses any cdn service, to be sure, how can I check this?( I didn’t find any installed plugin called Imperva or any plugin whose description refering cdn). * The only firewall plugin installed is “wordfence”, I already tried to disable the plugin but I still have the same issue. * I was looking at the chrome console and I noticed that in the source tab there isn’t the “wp-seo-post-scraper-1400.js?ver=14.0”, but the file is in the correct path. * [Suwash Kunwar](https://wordpress.org/support/users/suascat_wp/) * (@suascat_wp) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15068115) * [@fdig](https://wordpress.org/support/users/fdig/) * Could you please reach out to your hosting provider and confirm if any such configuration exists on your server interfering with your site? * If no such configuration exists, we want to confirm if there’s any conflict exists with theme or other plugin on your setup. * Often, we see problems occur in combination with another plugin or theme. The fastest way to rule out any conflict, is to **deactivate all non-Yoast plugins and switch to a standard theme** like [Twenty Twenty](https://wordpress.org/themes/twentytwenty/). * Please test this on your development or staging site, if you have one. If not, we recommend using the [Health Check & Troubleshooting](https://wordpress.org/plugins/health-check/) plugin. This plugin has a troubleshooting mode, which **does not affect normal visitors to your site**. * If you’re unfamiliar with checking for conflicts, we’d like to point you to a step-by-step guide that will walk you through the process: [How to check for plugin conflicts](https://yoast.com/help/how-to-check-for-plugin-conflicts/) * If you do not feel comfortable to do this yourself or if this does not solve your issue, our [Yoast SEO Premium plugin](https://yoast.com/wordpress/plugins/seo/) comes with one year of (technical) support.` * Thread Starter [fdig](https://wordpress.org/support/users/fdig/) * (@fdig) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15068307) * Hi [@suascat_wp](https://wordpress.org/support/users/suascat_wp/), * as I already said in the main ticket, I already tried this way using Health Check& Troubleshoot to check if there’s conflits between YoastSEO and other plugins but it seems there aren’t any.. * Plugin Support [Michael Tiña](https://wordpress.org/support/users/mikes41720/) * (@mikes41720) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15071646) * Hi, * We understand you’ve already performed a conflict check using the Health Check& Troubleshooting plugin and it still occurs with a default WP theme and only the Yoast SEO plugin activated. * Unfortunately, this isn’t something we can control as this is JavaScript manipulation between the server and client browser by the CDN/WAF. We suggest looking into contacting your web host/provider/reseller/CDN/WAF provider (e.g. Imperva) and perhaps flushing the cache / disabling any functionality that modifies these JS files. * Thread Starter [fdig](https://wordpress.org/support/users/fdig/) * (@fdig) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15072104) * Hi, * I solved my issue exclugins “wordpress-seo” folder in imperva firewall. * Thank you, F. * Plugin Support [Michael Tiña](https://wordpress.org/support/users/mikes41720/) * (@mikes41720) * [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15072138) * Hi [@fdig](https://wordpress.org/support/users/fdig/) * We’re glad to hear that you were able to resolve this issue with that exclusion! * This thread has been marked as resolved as the original poster confirmed the issue as resolved on their site. * If you are not the original poster and continue to experience a similar issue, please [open a new request](https://wordpress.org/support/plugin/wordpress-seo#new-post). That way it’s easier for us to match replies with a specific problem. Thanks! Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Uncaught SyntaxError: Invalid regular expression: /^*-+:*$/: Nothing to repeat’ is closed to new replies. * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908) * [Yoast SEO - Advanced SEO with real-time guidance and built-in AI](https://wordpress.org/plugins/wordpress-seo/) * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-seo/#faq) * [Support Threads](https://wordpress.org/support/plugin/wordpress-seo/) * [Active Topics](https://wordpress.org/support/plugin/wordpress-seo/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-seo/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wordpress-seo/reviews/) ## Tags * [javascript](https://wordpress.org/support/topic-tag/javascript/) * [Yoast](https://wordpress.org/support/topic-tag/yoast/) * 7 replies * 4 participants * Last reply from: [Michael Tiña](https://wordpress.org/support/users/mikes41720/) * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/uncaught-syntaxerror-invalid-regular-expression-nothing-to-repeat/#post-15072138) * Status: resolved