This is why I regularly advise new hires, both senior and right out of college, that communicating when you're blocked or stuck is not optional. The quickest way to get me to recommend a performance improvement plan isn't if you can't hack it on a particular task, it's if you aren't clear that you don't have what you need (voodoo to get tools working, training, experience) to get the job done. Being stuck and not speaking up is a cardinal sin in knowledge work.