This error has been happening since 12/7 and works on retry so I don't think the information I'm sending to the API is wrong. I've implemented a retry logic to make this works for now but 400 errors are meant to be validation errors so they should not be retried.
Here's an example response : { "status_code": 400, "headers": { "content-type": "text/html; charset=utf-8", "access-control-allow-origin": "*", "date": "Mon, 16 Dec 2024 00:01:59 GMT", "proxy-status": "proxy_internal_response; e_isproxyerr=\"AcJqtYNsV56RM_ClZdul06xJtp6hKj65V0wolpxT6hfAbFn-Ls5eM03pjfBKhQ\"; e_proxy=\"AcIgARnOpoqwJqFXX2ZmV44esN1aWh3ytzDIHumfDl9yKgD2jGvxv2iBIs5-tdmSfiu-GTevlZz5fKrCtgHq\"; e_fb_binaryversion=\"AcKUyHFyg4iLKNRrkQsQEV8FYWZr3YRUdv0vKEKocr4iH7-HZ_4tJAG2uBa9oHBBlOGwFep4bj6X4e7zok_5MO9Lti8A7m0pLRc\"; e_fb_httpversion=\"AcKLWm1VhhNQtSWq7iuRWuD2AXlnxE3tQ-q-medDtJb4Fo8YhSEUaQ49CEwD\"; e_fb_hostheader=\"AcJhkmUHwvh77kOrbCIh02kPkn8rWGKDqKDjXbuvTpO02ziC7ZWBy71uB2NGzUo2dZxv_3prBkTgPIYz\"; e_fb_requesttime=\"AcIoxUZB-giTdG3DDqfzDdnTxeGVv77ivVT63gxuEJENsafEhwGlL6ZNuua5cngtP-hP8Cp45A\"; e_fb_responsebytes=\"AcIHdhfuqy2l3HIm5CXYR5VBJkWWgftBSghbROriZd5Yi7R5yylpY-3yBcQBkg\"; e_fb_requestsequencenumber=\"AcJPxLZZzb3Bh6fFI_VTRiipbPLXcEY5nlfvbbf_RvRJkQpzuU85QiQ6n6g\"; e_fb_proxycode=\"AcKL1rAciNkOi4XA9SPL6hcesDxl7O7s8sopq5HSMlljz0ZYJAVQV0l8rCgm\"; e_fb_builduser=\"AcIVqVDRsMoEU9vvYHejbzaA2vX-Hn-pVkLiTm5F-Zb_mlfdlgOgwS6WYujRJvrSMOE\"; e_fb_vipport=\"AcJ0hRdA6Su739kNd_ztxOw11JeGlnwFc3F_quw_ORrAfe6x1BhNJuBLRIwe\"; e_clientaddr=\"AcJMiP0Ef40xjcURmgAbL7EPxnPKX8Fg5qtg58yeKTfsu9uq5OQl5Serne2uNI_CvC8OGLzHfKRxESBGNZk6KaD_I-u1A5ddLvBSj9CAqI42CfiScg\"; e_fb_vipaddr=\"AcIXe6ylNGn-bb0IpxjjHKe3MtMWZse3uj8PlnMOWdcJpM2R-b7uGI8XPVu9nW2lYqNXQ0kOEICa_-8cocal_y0IOCqpqSw2mRQm\"; e_fb_configversion=\"AcKuUbCiPhSXMa-93FodVx4PqW0DMz4dpJluWe-1yM2LA8C1ABv0YErTDkPgnw\", http_request_error; e_proxy=\"AcKZ9rRgaxdInPviP7Ci-Fojgb7Vci_TwWYQOwuTZwW4vPKHIIs71M8TKIN3bncbnkBpmSbLXSYRqx1g\"; e_fb_binaryversion=\"AcIMuKVPuDybdqGcrY3b19nl4f62c0CP0qS5mTsg9G0W5TDtVdiD-wo_FhCx9PRDIN7POCC48Jl11dH2qETqliKCpP5Y7i9ByUk\"; e_fb_httpversion=\"AcJyAy3zVycleYkAvhFEbA9gnE6p1EqHvtUx2ZCW-a_DqWHfOdJhEPGv1Vy1\"; e_fb_responsebytes=\"AcK6zgw3X5uXnEE3ZyZvfMatRd_fevKqzmEQaxVnqVq1KrTC-N3u3emtbhMK-Q\"; e_fb_requesttime=\"AcI-Ieii7TxtDsmQ0BLHBsWqFNnKJtGFoAg01aLdMZZMNSVb9dshreaHlhoI0mGWIBJD30803w\"; e_fb_requesthandler=\"AcJculNZl-hqCHTBxodsfMcHgg_XGwZwJqTjBfIluix8q3LmyLBAYBrLGyPstRXuasJpbRLwDIw\"; e_fb_hostheader=\"AcKRCNNWVPSkXhYEGs4O4XBhf_3TcMa_AK8lu-NAJZuDws7H0CjinDjLnomCTCSrhsqwI58XSAdMeaTQ\"; e_fb_requestsequencenumber=\"AcKq_YmYb8wDznL72JUF5kKOhdimZ6OlNizpH64ahbWrDRDN_JPQ5-5Adw\"; e_upip=\"AcK9mXIUjkV8hN98aiLqrhrBmkPheNOCna7H55LvwW95BpCuAT8VXAYTRsWJN0442bNrFCU7kX_ay_C_tiaVugGdcp-TM9CLca_x\"; e_fb_builduser=\"AcLLaIZY_PRloGwTqKeDnOnr6y2JYyKBv6LvIkPzteOtRPIhIg94eBMJc_eNAlGkT4I\"; e_fb_vipport=\"AcLAY3Kus7l9H8jk6CORJn2Wj-RHH1Aiqj7qpnwYEs8OJYaqWlaH3Cm1x56a\"; e_clientaddr=\"AcIEw79nom_oz4FltypW9p_mt9mn41LQSPkVlEm8NgPSSw5AzfH6DBEI8x9Zxwloz_KiTl8DMML-ow\"; e_fb_vipaddr=\"AcL6F0WU3dN6ougoUj08N3hTFkV6DzArgobc0RxkdpGowLXpF4XwW2ddBII-9d3NPPCguA\"; e_fb_configversion=\"AcL2IP-f7OmOndIUie4q1JwyM5GFJOW0pxZe52K8XLcZq1ahVluykDhLij2Rkw\"", "x-fb-connection-quality": "EXCELLENT; q=0.9, rtt=12, rtx=0, c=10, mss=1380, tbw=3405, tp=-1, tpl=-1, uplat=59, ullat=-1", "alt-svc": "h3=\":443\"; ma=86400", "connection": "close", "content-length": "2959" }, "response": "\n

\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n

\n", "message": "API error" }
Does anyone one know why this could be happening?
Thanks, Guillaume