Sometimes after an update to a new version, or a change has been made, you may see the error below.
To resolve this yourself, follow the steps below.
Open the Toolbox Options and click on "Properties".
The information in the Toolbox Properties will be vital for the next step. (The image below is for example use only, don't change your settings to match. Use your environments settings.)
The SQL Server and the Bulk Load Folder are important. Make note of them
Now, you have to go back to the main part of the tool box and click on which project you are trying to run. Then right click on this to bring up this screen. Then click on "Edit Project"
Now, click on the Edit Project.
The settings we are looking for are the ones highlighted below; "Project Results SQL Server Name", "Project Bulkload Folder Path", and "Project Results Database".
These should be the same one as in the Toolbox Properties unless you are sending it to another SQL Server, which is a new feature.
Once you have done all of this log out of your toolbox by hitting the Exit toolbox tab and then log back in.