I recently started working with KNIME and I’m trying to send e-mails and need the “table to HTML string” node. I cannot find it in the repository and when I open a workflow that contains one, I get the option to install it but then a message “Could not find any extensions that provides the missing nodes”.
I tried to go to File > install KNIME extensions - still not available.
That node is part of the Lhasa public plugin. It should be listed. Which version of KNIME do you have? I just installed it on V4.6 and it is working fine here.