I'm sorry, but this is flat wrong, you should not be using solid core cable to crimp ends on. Sure you can make it work, and most of the time it will work ok, but when you need to make sure it works for the long haul you need to be sure to use stranded for crimps.
On your prior, yes, shielding done wrong can cause problems, so I avoid it at all costs, unless it MUST be done. Most Cat6a each wire pair is shielded, so you have to work with shielded wiring in that case. The shielding is just a pain to handle. It isn't impossible, but it is a pain.
On solid for crimp ends, yes, it "shouldn't be done", but it certainly can be and it can work just fine if you ensure you do a good crimp.
The issue isn't a crimp on solid versus stranded, it is that you should NOT be using solid for patch cables, period. It can be done (I do it, because I have LOTS of solid core cabling, and when I need a specific length cable quick...), but the issue is that solid core is much less forgiving of turn radius/cable crushing as well as it'll fatigue and break much sooner than stranded will. It is also less flexible.
So, solid core CAN be used for patch cabling, which means crimped ends, but I'd avoid it in most cases. That said, you aren't often mechanically working a patch cable often, as it just sits there behind your equipment. I'd never use one for a laptop or other portable device that I was often plugging and unplugging, etc.
That said, if you need a cable, unless you need it right away, just buying a patch cable, or buying a bunch of patch cables in bulk is the way to go. Fool proof, huge time saver and not a lot more than buying the cabling and connectors in bulk and making your own cables.