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@bubbabeast81
I highly recommend using CKAN for installing and managing any mods you may wish to use in KSP.  The error you are seeing, as has been stated by others, appears to be an incompatibility issue, coupled with missing dependencies.  CKAN will help you with installing not just a given mod, but also by insuring you are getting the most/latest compatible version AND any/all dependencies you may need to get that mod to run properly.  You can check the CKAN thread, which includes how to download, install, and run it, right here:
CKAN (The Comprehensive Kerbal Archive Network) - v1.29.2 Freedman - Add-on Releases - Kerbal Space Program Forums

This sometimes happens to me when I switch from KSP to Paint for screen capturing.  The only solution I've found is to exit KSP and restart.  If you find a better solution, let us know.

To get suborbital, use a gravity turn:
When launching, make sure the rocket faces east.  That is, when you pitch using the S key, your rocket should turn towards the ocean. When you reach ~75 m/s speed, pitch east 10 degrees and hold that. When you hit an altitude of ~4000 meters, pitch another 10ish degrees east (you will be in the neighborhood of 20ish degrees at this point) and hold that. When you hit an altitude of ~10000 meters, pitch east all the way to 45 degrees and hold that. Pay attention to what your Ap is going to be; you may need to switch to map view or use a mod like KER or MJ.  When your Projected Ap hits ~71000 meters, kill the engine and coast. Now the tricky part.  Pitch to somewhere between 70 and 90 degrees, and watch the time to hit Ap.  Again, you may need to use a mod (I use MJ).  When the time to hit Ap reaches 15 or so seconds, throttle up and keep throttling until the time to hit Ap hits 25 seconds.  You may need to alter your pitch up or down so as to both not hit Ap AND not go too far beyond 25 seconds.  Several bursts like this will get your Pe to about 71000 meters and keep your Ap at/just below 80000 meters. Keep an eye on your TWR during all of this.  On the right of the navball is the force bar, right?  That goes up the more thrust you give.  Keep the pointer in that bar just over the first tick mark, and never over the second, any time you are thrusting.
This should help you circularize.  Obviously, once you get the orbit I mentioned above, you can do small thrusts at Ap to get the Pe closer.
I hope this helps!