When I craft, I don’t see the bar showing progress as it makes the item. Also, possibly related, I was on the farm in MoP and after planting a seed, I got that wild vine that you jump on and spam 1 until it starts to counter and then you hit 2 to interrupt, but I couldn’t see the bar showing the vine countering.
In my Edit Mode, I have check marks next to Cast Bar and Encounter Bar, but that doesn’t help.
If you move the main bar at all, many of the other things (including the cast bar) collapse to the bottom, and it’s very easy for them to end up underneath other stuff (especially action bars.) You may have to temporarily move stuff you’ve got at the bottom center of your screen while in edit mode to find your cast bar so you can move it.
If you’re using Quartz, it isn’t working propery with the PlayerCastingBarFrame yet even if you opt to use the default Blizzard casting frame
This was good advice and helped me find the cast bar. Unfortunately though when in a vehicle, like the wild vine, I still don’t see it. Not sure what kind of bar that’s called where you see the vehicle countering.
Since when can you craft while in a vehicle?
No no. Crafting is now fine. It’s when you are in a vehicle like the wild vine on the MoP farm where you spam 1 until the vine reacts and counters and you have to interrupt by hitting 2. I don’t see the counter bar that you have to interrupt.
I just tested this myself with a fully default setup, and I’m not getting the cast bar with the vines. (I also checked that the castbar position was high enough to clear the vehicle UI.) I submitted a bug report in game, you might want to do the same.
TFW you realize you’re not going crazy 
Thanks.