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Geta.SEO.Sitemaps error in Admin view
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Hi,
I'm using EpiServer CMS 7.19.1.0, and I install package for Geta.SEO.Sitemaps but I have the following error in Admin - Search engine sitemap settings
Method not found: 'EPiServer.UI.SystemMessageContainer EPiServer.UI.SystemPageBase.get_SystemMessageContainer()'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.MissingMethodException: Method not found: 'EPiServer.UI.SystemMessageContainer EPiServer.UI.SystemPageBase.get_SystemMessageContainer()'.
Does anoyne know what could be the problem?
Thanks