File upload issues

“POST /wp-json/contact-form-7/v1/contact-forms/356/feedback HTTP/1.1” 200 1499 “https://sixtysixty.co.uk/cyfarthfa-high-school-pass-application/” “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36”

Could anyone tell me what this means. Its the error I get when trying to upload a picture thats too big or too small. Thanks.