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I’m trying to figure it out, would it be possible to provide a little bit more detail, e.g. how you use the captcha (comment form, cf7, elementor)? Thank you!"},{"position":2,"author":"peter09z","published_at":"2023-07-23T20:52:00+00:00","body_summary":"Hi Tamás, I use it exclusively on the WordPress comment form. If you need to know anything else just ask."},{"position":3,"author":"Tamás","published_at":"2023-08-03T18:43:00+00:00","body_summary":"First of all, thank you for your patience. I tried and tested some stuff regarding this error and found that it only seems to happen, if there is output / headers sent / error happening in another plugin or theme...."}],"source_links":[{"source_url":"https://wordpress.org/support/topic/headers-have-already-been-sent/","url":"https://wordpress.org/support/topic/headers-have-already-been-sent/","original_url":"https://wordpress.org/support/topic/headers-have-already-been-sent/","source_page_url":"/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fheaders-have-already-been-sent%2F","source_api_url":"/api/evidence/source?url=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fheaders-have-already-been-sent%2F"},{"source_url":"https://wordpress.org/plugins/eazy-cf-catpcha/","url":"https://wordpress.org/plugins/eazy-cf-catpcha/","original_url":"https://wordpress.org/plugins/eazy-cf-catpcha/","source_page_url":"/plugin/eazy-cf-catpcha","source_api_url":"/api/plugins/eazy-cf-catpcha"}],"source_link_count":2,"market_key":"cf7","market_name":"Cf7","market_url":"/markets/cf7","opportunity_url":"/opportunities/cf7","opportunity_card":{"key":"forms-leads","name":"lead capture 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