Data Loading Tools fail to open after update to Pro 3.0.1

Question

I'm working with the Lead Service Lines Solutions package and have added the dltsolutions package to my cloned environment. I recently updated my Pro to version 3.0.1. Now, when I try to open even of the tools in the toolbox, I get the error:

Tool has failed to open.

'dlt.CreateDataLoadingWorkspace'

Error HRESULT E_FAIL has been returned from a call to a COM component.

The package appears to be correctly installed with no updates available.

dltsolutionspkg.PNG

MarcGraham2_0-1724621875756.png

GelisaJoseph · Answer

If you restart ArcGIS Pro and this issue still appears then I would delete the cloned environment. Once the previous environment is deleted, I would complete the install toolbox steps again.

SepheFox1 · Answer

Oh never mind. I just needed to restart Pro after adding the toolbox, apparently. Well, maybe this will help others.

SepheFox1 · Answer

Same. I just upgraded from 2.8 to the latest version, which is 3.03. I haven't used the data loading toolbox before, but I just added it after the upgrade. Unable to use any of them, with the same error message you got.