# Opening a channel shows a blank page in V13.4.6 after Upgrading from V12.6.13 **URL:** \ **Category:** Experience Manager (PaaS/OnPrem)\ **Created:** [December 24, 2020, 5:58am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290 "2020-12-24T05:58:04Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [December 24, 2020, 5:58am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/1 "2020-12-24T05:58:04Z")
Hi All, When I try to deploy v13 upgraded code into higher environments. CMS, site and console are loading fine, but on click of channel in CMS, it shows blank page. When I inspect and verify the network tab, below mentioned URL is returning 404. I don’t see any errors or exceptions in the logs. this works fine in local environment. we are using single distribution. I have also added nochannelinfo =true to the rest mounts. Could you please help us in resolving the issue. **Request URL:** [https://cms.qa.example.com/auth?destinationPath=/site/\_cmssessioncontext&cmsCSID=88cf4ece-5108-4ba4-b875-dd1e458c2376](https://cms.qa.example.com/auth?destinationPath=/site/_cmssessioncontext&cmsCSID=88cf4ece-5108-4ba4-b875-dd1e458c2376) [Channel Manager Troubleshooting - Bloomreach Experience - Open Source CMS](https://documentation.bloomreach.com/13/library/concepts/channels/channel-manager-troubleshooting.html#opening_channel_blank_page) Thanks and Regards, Yeshwanth Lagala. ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [December 28, 2020, 8:29am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/2 "2020-12-28T08:29:41Z")
Below info is shown in logs when i tried to access the channel in CMS. 28.12.2020 08:25:48 DEBUG http-nio-8080-exec-21 [HstsHeaderWriter.writeHeaders:129] Not injecting HSTS header since it did not match the requestMatcher org.springframework.security.web.header.writers.HstsHeaderWriter$SecureRequestMatcher@2cd434bc ---
**Author:** ![bcanvural](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/bcanvural/32/235_2.png) [@bcanvural](https://community.bloomreach.com/u/bcanvural)\ **Post date:** [December 28, 2020, 8:44am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/3 "2020-12-28T08:44:03Z")
Do you get some interesting info if you enable logging for “org.hippoecm.hst.container.HstDelegateeFilterBean” ? ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [December 28, 2020, 10:07am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/4 "2020-12-28T10:07:16Z")
Hello @bcanvural I don’t see any logs after enabling. Could you please suggest any. ---
**Author:** ![bcanvural](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/bcanvural/32/235_2.png) [@bcanvural](https://community.bloomreach.com/u/bcanvural)\ **Post date:** [December 28, 2020, 10:32am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/5 "2020-12-28T10:32:51Z")
Well, you should see SOME logs after enabling that. Maybe also enable logging for “org.hippoecm.hst.core.container.AbstractBaseOrderableValve” probably something is going wrong in the handshake between cms and the site. Specifically CmsSecurityValve would be of interest. Another thing I notice is that the “destinationPath” query string contains context path. Can you share your hst platform host config and hst:myproject’s hst host config? maybe there’s a hst:showcontextpath property somewhere that should be toggled on or off. ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [December 28, 2020, 11:11am UTC](https://community.bloomreach.com/t/opening-a-channel-shows-a-blank-page-in-v13-4-6-after-upgrading-from-v12-6-13/2290/7 "2020-12-28T11:11:29Z")
Thank you @bcanruval enabling showcontextport in platform and host configurations has resolved the issue.