Title: Critical Error When Configuring API Last modified: June 24, 2025 --- # Critical Error When Configuring API * Resolved [gisellejb](https://wordpress.org/support/users/gisellejb/) * (@gisellejb) * [11 months, 1 week ago](https://wordpress.org/support/topic/critical-error-when-configuring-api/) * Dear Post SMTP Support Team, * I hope you’re well. I’m reaching out because I’m experiencing a critical error on my website whenever I try to configure the API key in the Post SMTP plugin. * I’m not a developer, so I’m feeling a bit lost here. As soon as I enter the API key and try to proceed, the website crashes and shows a critical error message. I’m unsure what’s causing this or how to fix it. I have tried changing the Client ID and Secret without luck. * I would really appreciate any help or guidance you can offer to get this resolved. Please let me know if you need any specific information from me, and I’ll do my best to provide it. * Thank you so much in advance for your support! * Best regards, gisellejbP.S Here’s the report from my dashboard * **Mailer:**postsmtp**HostName:**caminodeplaya.com**cURL Version:**7.74.0**OpenSSL Version:**OpenSSL/1.1.1w**OS:**Linux info 3.0 #1337 SMP Tue Jan 01 00:00:00 CEST 2000 all GNU/Linux**PHP:**Linux 8.3.22 C.UTF-8**PHP Dependencies:**iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=No, allow_url_fopen=Yes, mcrypt=No, zlib_encode =Yes**WordPress:**6.8.1 en_GB UTF-8**WordPress Theme:**Milos**WordPress Plugins:** Polylang, Post SMTP, Akismet Anti-spam: Spam Protection, Companion Auto Update, Duplicate Page, Duplicator, Elementor, Embed Maps Block, Envato Elements, Image Optimizer – Compress, Resize and Optimize Images, Jetpack, LiteSpeed Cache, Maintenance, Photo Gallery, Responsive Full Width Background Slider, 10Web Booster, Title Remover, Yoast SEO, WP Booking System, WP Go Maps (formerly WP Google Maps), WPForms Lite**WordPress wp_mail Owner:**/homepages/44/d768804095/htdocs/caminodeplaya. com/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php**WordPress wp_mail Filter(s):**wp_staticize_emoji_for_email, PostsmtpMailer->get_mail_args**Postman:** 3.3.0**Postman Prevent Message Sender Override (Email|Name):**No | No**Postman Active Transport:**Default (smtp:none:none://localhost:25)**Postman Active Transport Status (Ready|Connected):**No | No**Postman Selected Transport:**Gmail API (https: login://www.googleapis.com:443)**Postman Selected Transport Status (Ready|Connected):** No | Yes**Postman Deliveries (Success|Fail):**4988 | 16827 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcritical-error-when-configuring-api%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 3 replies - 1 through 3 (of 3 total) * Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/) * (@aqibkhan9) * [11 months, 1 week ago](https://wordpress.org/support/topic/critical-error-when-configuring-api/#post-18527244) * Hello @gisellejb  , * We hope this message finds you well. * Thank you for reaching out to our Support team. We are truly sorry to hear about the issue you are experiencing. * To resolve this, kindly generate a new **Client ID** and **Client Secret** and reconfigure the settings. You can refer to our [documentation ](https://postmansmtp.com/documentation/sockets-addons/gmail/) for step-by-step guidance. * Also, make sure you have the Query Monitor plugin installed on the site before hand. Just in case the site crashes it will give us some insights into the error, share those with us. * If you encounter any difficulties during the process or need further assistance, please don’t hesitate to reach out to us. We’re here to help! * Best regards, Support Team – WP Experts * Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/) * (@aqibkhan9) * [11 months ago](https://wordpress.org/support/topic/critical-error-when-configuring-api/#post-18533479) * Hello @gisellejb , * We hope you are doing well. * We are marking this thread as resolved due to inactivity. If you encounter any further issues, please feel free to open a new thread. * Have a great day! * Thanks and regards, Support Team – WP Experts * Thread Starter [gisellejb](https://wordpress.org/support/users/gisellejb/) * (@gisellejb) * [11 months ago](https://wordpress.org/support/topic/critical-error-when-configuring-api/#post-18533785) * Thank you so much for the Support. After changing credentials and signing to a free trial in the Google Cloud I could solve it. However, this is a temporary fix. Is there another way without paying in the Cloud? This wasn’t an issue before. Viewing 3 replies - 1 through 3 (of 3 total) The topic ‘Critical Error When Configuring API’ is closed to new replies. * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655) * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/post-smtp/) * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/) * 3 replies * 2 participants * Last reply from: [gisellejb](https://wordpress.org/support/users/gisellejb/) * Last activity: [11 months ago](https://wordpress.org/support/topic/critical-error-when-configuring-api/#post-18533785) * Status: resolved