How to "Solve" Solver Optimization Mix Problem Errors

Hello all,

I'm a little new to solver, so i'm probably missing something very simple, but here's my problem.

I have a list of technologies with associated capabilities (score of 1-5). I have a set of requirements for said capabilities (score of 1-5). I have costs associated with each technology.

I would like to run solver to find the most optimal combination of capabilities such to maximize the total score, given a cost constraint.

However, when I run Solver in the attached, I keep getting either a linearity error or a "solver cant find solution". I know there's at least a feasible solution (I've done it myself).

Please help!

Best,
Chris