Title: Paypal API not working Last modified: August 31, 2016 --- # Paypal API not working * Resolved [bamro](https://wordpress.org/support/users/bamro/) * (@bamro) * [10 years, 4 months ago](https://wordpress.org/support/topic/paypal-api-not-working/) * Hi, * The paypal API is failing with the below error. It has been working fine for 4 months (maybe in the last update the problem started?). I have contacted paypal and no problem at their end and it is working fine on 2 other websites. I would appreciate some assistance. * Thanks * Express check out API call failed. * Error code: 99998 * Error severity code: Error * Detailed error message: Currency is not supported. * Short error message: Transaction refused because of an invalid argument. See additional error messages for details.. * [https://wordpress.org/plugins/booking-system/](https://wordpress.org/plugins/booking-system/) Viewing 12 replies - 1 through 12 (of 12 total) * [Roborovskii](https://wordpress.org/support/users/roborovskii/) * (@roborovskii) * [10 years, 4 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927190) * I’m having the same error, but I am a new user…. so not sure if it is due to my mis-configurations or lack of…. would like to know the outcome of this. Thanks! * [Roborovskii](https://wordpress.org/support/users/roborovskii/) * (@roborovskii) * [10 years, 4 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927197) * I upgraded to pro. It seems ok now… Not sure what happened. * Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * (@dotonpaper) * [10 years, 4 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927283) * Hello bamro, * The bug will be fixed in the shortest time. * [@roborovskii](https://wordpress.org/support/users/roborovskii/), * About the Pro version write at [support@dotonpaper.zendesk.com](https://wordpress.org/support/topic/paypal-api-not-working/support@dotonpaper.zendesk.com?output_format=md). * Thank you. * [tobecom](https://wordpress.org/support/users/tobecom/) * (@tobecom) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927370) * I’ve the same problem, when it will be solve ? * Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * (@dotonpaper) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927371) * Hello tobecom, * Please write at [support@dotonpaper.zendesk.com](https://wordpress.org/support/topic/paypal-api-not-working/support@dotonpaper.zendesk.com?output_format=md) to help. * Thank you. * [mardimichels](https://wordpress.org/support/users/mardimichels/) * (@mardimichels) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927395) * Can you actually post some information in this forum to help out with these issues instead of “resolving” them by asking people to email you? WOuld save you a lot of emails 😉 I am having the same issue. * Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * (@dotonpaper) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927397) * Hello mardimichels, * You can find the file addons/paypal/dopbsp-paypal.php * and change * ``` function expressCheckOut($language, $currency_code, $page_url){ ``` * with: * ``` function expressCheckOut($calendar_id, $language, $currency_code, $page_url, $extra_url){ ``` * The fix will be included in the next update. * Thank you. * [mardimichels](https://wordpress.org/support/users/mardimichels/) * (@mardimichels) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927398) * Sorry where exactly do I find these files? Also, PayPal function “included in the next update”? Wow. I would think that is actually a MUST have feature. Also, why did it stop working? I channged nothing in my site and all of a sudden it stopped working. * [mardimichels](https://wordpress.org/support/users/mardimichels/) * (@mardimichels) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927399) * Is this in the free version (the code that needs changing?) * Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * (@dotonpaper) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927400) * This forum is for the free version. The file location is booking-system/addons/ paypal/dopbsp-paypal.php * Thank you. * [mardimichels](https://wordpress.org/support/users/mardimichels/) * (@mardimichels) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927401) * Thank you – this worked well. * Plugin Author [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * (@dotonpaper) * [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927402) * Glad it worked. * Thank you. Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘Paypal API not working’ is closed to new replies. * ![](https://ps.w.org/booking-system/assets/icon-256x256.png?rev=2192807) * [Pinpoint Booking System - Version 2](https://wordpress.org/plugins/booking-system/) * [Frequently Asked Questions](https://wordpress.org/plugins/booking-system/#faq) * [Support Threads](https://wordpress.org/support/plugin/booking-system/) * [Active Topics](https://wordpress.org/support/plugin/booking-system/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/booking-system/unresolved/) * [Reviews](https://wordpress.org/support/plugin/booking-system/reviews/) * 12 replies * 5 participants * Last reply from: [DOTonPAPER](https://wordpress.org/support/users/dotonpaper/) * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/paypal-api-not-working/#post-6927402) * Status: resolved