I created a node and locally installed it in my ~/.node-red with npm install . No Error happend and I can see a link to the installed folder in node_modules.
But I can't find the node in my node palette. What is the problem?
Have you restarted node-red since you installed it. That is necessary when installing with npm.
Otherwise, have you included a node-red section in its package.json? I am not certain but I suspect if that is missing it could cause that problem.