Kentico 12 to Kentico 13 Upgrade

I would recommend looking at the upgrade notes on the Dynamic Routing readme, have you read through and followed those steps?

Hi Liam, Thank you for your response. I am planning to do clean K13 core development for the frontend site and will utilize the migration tool to upgrade the Admin site. I hope this approach proves effective. I would appreciate any suggestions you may have regarding this plan.

Regards, Geo

After migrating from Kentico 12 to Kentico 13, I encountered a couple of errors when attempting to make changes to the Sites section, as well as when trying to save the page type objects. Please see the error details below. Any suggestions or insights would be greatly appreciated.

Server Error in '/' Application. Object type 'cms.cssstylesheet' not found. 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.InvalidOperationException: Object type 'cms.cssstylesheet' not found.

An error occurred when saving data. Please see event log for more details. Message:

UPDATE CMS_Tree SET [NodeCacheMinutes] = @NodeCacheMinutes, [NodeDocType] = @NodeDocType, [NodeHeadTags] = @NodeHeadTags, [NodeBodyElementAttributes] = @NodeBodyElementAttributes, [NodeInheritPageLevels] = @NodeInheritPageLevels, [RequiresSSL] = @RequiresSSL, [NodeGroupID] = @NodeGroupID, [NodeTemplateID] = @NodeTemplateID, [NodeTemplateForAllCultures] = @NodeTemplateForAllCultures, [NodeInheritPageTemplate] = @NodeInheritPageTemplate, [NodeAllowCacheInFileSystem] = @NodeAllowCacheInFileSystem, [NodeIsContentOnly] = @NodeIsContentOnly, [NodeBodyScripts] = @NodeBodyScripts WHERE [NodeID] = @NodeID

Caused exception: Invalid column name 'NodeCacheMinutes'. Invalid column name 'NodeDocType'. Invalid column name 'NodeHeadTags'. Invalid column name 'NodeBodyElementAttributes'. Invalid column name 'NodeInheritPageLevels'. Invalid column name 'RequiresSSL'. Invalid column name 'NodeGroupID'. Invalid column name 'NodeTemplateID'. Invalid column name 'NodeTemplateForAllCultures'. Invalid column name 'NodeInheritPageTemplate'. Invalid column name 'NodeAllowCacheInFileSystem'. Invalid column name 'NodeIsContentOnly'.

Invalid column name 'NodeBodyScripts'.