[keycloak-user] Error io.undertow with HTTPS

Hello all Since i access to my keycloak server in https, i have this kind of error. I don't understand where it comes from. Any ideas ? Error : ERROR [io.undertow] (default task-6) UT005085: Connection io.undertow.server.protocol.http2.Http2ServerConnection@772a5b27 for exchange HttpServerExchange{ GET /auth/resources/3.4.3.final/admin/keycloak/templates/kc-menu.html request {accept=[application/json, text/plain, */*], accept-language=[fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3], accept-encoding=[gzip, deflate, br], user-agent=[Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0], referer=["host":/auth/admin/master/console/], Host=[host]} response {Cache-Control=[max-age=2592000], X-Powered-By=[Undertow/1], Server=[WildFly/11], Content-Type=[text/html;charset=UTF-8], Content-Length=[5670], Date=[Tue, 17 Apr 2018 14:48:25 GMT], :status=[200]}} was not closed cleanly, forcibly closing connection Thanks