The search is for an active, lead-free 0.1uF ceramic capacitor.The search has lots of results and stock-range.
Starting from this URL:http://parts.io/search/Class-Capacitors/Category-Ceramic%20Capacitor?Pbfree%20Code=yes&Capacitance=.1-.1&Part%20Life%20Cycle%20Code=active
Click the 'has stock' button. The browser returns 'No category found' at the top-level category selection page.
Tested in Chrome and Safari on OSX.
Verified on mine as well (during a demo, no less!). Will forward to the development team. Thank you!