`Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest`
Caused by: java.lang.IllegalStateException: Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: ServletWebRequest: uri=/micropub;client=127.0.0.1;user=org.springframework.security.oauth2.core.DefaultOAuth2AuthenticatedPrincipal@4214ae8f