ShellExec command exited non-zero exit value (when installing Extensions)

Hi,

For the L4-TP course, I try to install the necessary extensions “Redfield BERT Nodes” and “Redfield NLP Nodes”.

I tried the installation in my company network, with active proxy settings (that allowed me to install other extensions) and also from home without any VPN or proxy connections. I always get this error.

When researching, I found the “long path limitations” note in the General Information section of the Extension.

And I checked my registry if this is set. Yes, it is.

Any other ideas why I get this error?

In addition, I also tried to run KNIME as an Administrator to rule out permission problems. Same result.