Although I have the Term Vector node configured to create a bit vector, when I try to reopen the configuration window I get the error in the attached image. The node runs just fine, however. I have to add a TF node after the Bag of Words Creator node just to be able to open the Term Vector node’s configuration window.
Thank you for reporting this, I will open a ticket for this.
Just to have this documented for others stumbling over this issue: It is a dialog issue. The dialog needs a numerical column, otherwise it cannot be opened, or different said it cannot fill the deactivated selection box. The workaround is, to add any numerical column, e.g. with the TF or the Constant Value Column node. We will fix this.