Definitely for advanced users.
This is a fork of the now-discontinued uMatrix.
nuTensor does not guarantee that sites will work fine: it is for advanced users who can figure how to un-break sites, because essentially nuTensor is a firewall which works in relaxed block-all/allow-exceptionally mode out of the box: it is not unexpected that sites will break.
So this means do not file issues to report broken sites when the sites are broken because nuTensor does its job as expected. I will close any such issue without further comment.
Using nuTensor logger is key to un-break sites: the logger will show you all that nuTensor does internally.