EventID 7043 Source: SharePoint Foundation
Load control template file /_controltemplates/TaxonomyPicker.ascx failed: Could not load type ‘Microsoft.SharePoint.Portal.WebControls.TaxonomyPicker’ from assembly ‘Microsoft.SharePoint.Portal, Version=18.104.22.168, Culture=neutral, PublicKeyToken=71e9bce111e9429c’.
The file drive:\Program Files\Common Files\Web Server Extensions\14\TEMPLATE\CONTROLTEMPLATES\TaxonomyPicker.ascx is badly formed and doesn’t compile.
You can change the bad syntax of the file. To Fix:
Find the character string , and replace with a comma ‘,’ (without quotes).
Or, rename it TaxonomyPicker.ascx_broken. It is badly formed, but the file is never actually used. Thank you to this post for the answer: