Undiefindied Errors in Log

At last Time i become this Error(s)..
Please can you help me find the Error…

Error] [IMAGE] – -=ERROR=- Server can’t access it’s own images. (Image URL: https://3c-bap.web.de/mail/client/attachment/view/tmai14cbe9d6c06aba28/RldNQUlMOWYyMDdjODMyMWFjMjZjOTEyZWNhYjY3ZWEzMDg2MGU;jsessionid=D531B3DF2ABCA16D25A610D2E9781083-n1.bap61b) Most probably it’s a DNS problem. Please contact your hosting provider. a:4:{s:7:”headers”;a:19:{s:4:”date”;s:29:”Tue, 27 Jun 2017 08:14:53 GMT”;s:6:”server”;s:6:”Apache”;s:27:”access-control-allow-origin”;s:1:”*”;s:28:”access-control-allow-methods”;s:18:”POST, GET, OPTIONS”;s:22:”access-control-max-age”;s:7:”1728000″;s:22:”x-content-type-options”;s:7:”nosniff”;s:26:”x-ui-internal-gurid-suffix”;s:24:”WVIT-awTqQsAAF7b96wAAAj0″;s:12:”x-robots-tag”;s:17:”noindex, nofollow”;s:23:”content-security-policy”;s:17:”frame-ancestors *”;s:13:”cache-control”;s:26:”no-cache, no-store, public”;s:10:”set-cookie”;s:63:”autoClick=active; Expires=Tue, 27-Jun-2017 08:15:53 GMT; Path=/”;s:7:”expires”;s:29:”Thu, 01 Jan 1970 00:00:00 GMT”;s:6:”pragma”;s:8:”no-cache”;s:4:”vary”;s:15:”Accept-Encoding”;s:16:”content-encoding”;s:4:”gzip”;s:10:”keep-alive”;s:18:”timeout=3, max=100″;s:10:”connection”;s:10:”Keep-Alive”;s:17:”transfer-encoding”;s:7:”chunked”;s:12:”content-type”;s:23:”text/html;charset=UTF-8″;}s:4:”body”;s:6169:” WEB.DE – Fehler var ClientProperties = { browser : {“os”:”windows”,”engine”:”webkit”,”classes”:”windows webkit chrome chrome56″,”family”:”chrome”,”version”:”56.0″}}; var phx = { vars : {“iac.serviceId”:”mail”,”blankUrl”:”https://3c-bap.web.de/mail/client/blank”,”historyCallbackUrl”:”../../../server/error;jsessionid=D531B3DF2ABCA16D25A610D2E9781083-n1.bap61b?138-1.IBehaviorListener.0-&historyHash=”,”performance”:{“usecase”:{“OPEN_HTML_EDITOR”:”mail:html.editor.open”,”MAILER_INITIALIZED”:”nav.mail.folder.inbox”}},”iac.token”:”93c3dbe7250a39069855eea0e2fccf0c”,”iOSDisplayMailTimeout”:500,”pgpAccountId”:null,”useExternalAdServerForBanners”:true,”iac.callbackUrl”:”../../../server/error;jsessionid=D531B3DF2ABCA16D25A610D2E9781083-n1.bap61b?138-1.IBehaviorListener.1-“,”pgp.enabled”:true}}; Wenn Sie ein Bildschirmleseprogramm verwenden, dann empfehlen wir Ihnen, folgende Seite zu verwenden: https://mm.web.de Ups, hier hat sich ein Fehler eingeschlichen… Fehler-Code: 403 Zurück zum Posteingang /**/ /**/ “;s:8:”response”;a:2:{s:4:”code”;i:403;s:7:”message”;s:9:”Forbidden”;}s:7:”cookies”;a:1:{i:0;O:15:”nxs_Http_Cookie”:5:{s:4:”name”;s:9:”autoClick”;s:5:”value”;s:6:”active”;s:7:”expires”;i:1498551353;s:4:”path”;s:1:”/”;s:6:”domain”;N;}}}