{"id":18982252,"date":"2026-08-03T08:20:43","date_gmt":"2026-08-03T08:20:43","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/issue-invalid_parameter_syntax\/"},"modified":"2026-08-03T08:20:43","modified_gmt":"2026-08-03T08:20:43","slug":"issue-invalid_parameter_syntax","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/issue-invalid_parameter_syntax\/","title":{"rendered":"Issue INVALID_PARAMETER_SYNTAX"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Hi,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since updating to version 4.1.0, I&#8217;ve been getting the <strong>&#8220;INVALID_PARAMETER_SYNTAX The value of a field does not conform to the expected format.&#8221;<\/strong> error when paying with PayPal. I updated to version 4.1.1, but the issue persists. To resolve this, I&#8217;m using version 404.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I created a test version of the website with all plugins disabled except for WooCommerce and PayPal. The issue occurs with both versions <strong>4.1.0<\/strong> and <strong>4.1.1<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I would appreciate your assistance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can access the test site if needed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-18982252","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/18982252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/18982252\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=18982252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}