I have the same problem already discussed in a previous post:
Unfortunately, the issue was not really fixed here.
No matter in which format I want to create a preview or the final report, I get the following error message:
I tried to put the actual IP adress of my local machine in the preferences but this had no influence.
Deactivating the firewall wasn’t a solution either.
KNIME has to executed as administrator. This solves the issue.
Thanks for posting your solution!
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