For the Blocks plugin to function correctly, it is necessary that your Revit is, at a minimum, version 2020.2.6. However, it is important to consider that, for each subsequent year of Revit, a specific minimum version is recommended, listed below:

You can check for updates available for your Revit through the Autodesk Access application, provided by Autodesk; or through your account manager after accessing it on the Autodesk website.

If no updates appear to be available, it is recommended to log in to your Autodesk account and try extending the time period defined in the search filter for updates.

Click here to learn about the guidance provided by Autodesk regarding Revit updates.