

(For Revit 2021 and each country/ region option, there are two content files one for libraries and one for templates.For Revit 2021 see Autodesk Revit 2021 Content.The solution is to access the Autodesk Revit Content web pages for your version of Revit and install the appropriate content:

This issue is known to affect the UK, English (US Metric) and English-Imperial (US Imperial) content and may potentially affect that for other countries/ regions also. This will cause issues with integration and should be corrected.

Users will find that several important ‘.rfa’ format files or the associated ‘.txt’ information files may be missing or contain incomplete data. Since version 2021, it appears that Autodesk have streamlined their installation and now the initial family content installed by the default installation is incomplete.
