EPiServer.CMS.UI 11.14.0 Cannot Read Property "ContentData" of Null error

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I got this same error after updating to EPiServer.CMS.UI 11.14.0.  It is preventing the publish menu from dropping down correctly

https://world.episerver.com/forum/developer-forum/-Episerver-75-CMS/Thread-Container/2019/1/cannot-read-property-contentdata-of-null----publish/

When  I downgraded to EPiServer.CMS.UI  11.13.2, the drowndown menu worked fine.   

#200263
Jan 07, 2019 21:00
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Hi I got the same issue with package 11.16...

#201000
Feb 01, 2019 11:39
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Also seeing this on 11.16.  Am going to try upgrading Epi and see if that helps.

Did you ever find a resolution?

#228335
Sep 23, 2020 17:28
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Hi Dylan

Do you have Episerver.Marketing.Testing package installed in your solution? if yes, which version is currently installed? 

There is a known bug on version 2.5.4

https://world.episerver.com/documentation/Release-Notes/ReleaseNote/?releaseNoteId=MAR-1213

#228359
Sep 24, 2020 0:11
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