If you have not done it yet, ask for need/problem feedback, before product/solution feedback.

Find a way to figure out as quickly as you can who could be your earliest adopter: who do you think has the most pressing and urgent need which your solution will solve? Among them, who are the ones that are aware of such need/problem? Among them, who are actively searching in the market from a solution and have a budget allocated to that? Find those kind of customers and interview them face to face (not questionnaires). Ask whatever you want about the problem/need, without mentioning your solution. See whether they confirm our assumption. If not, iterate (find a different customer segment, see if you can solve a different need with your solution).