Funding Projects bug: it force me to chose a reward.

Hello,

i have a big problem: when i try to fund a project and it have a reward, it force me to choose a reward (i cant not chose a reward).

Otherwise, if a project doesnt have a reward, it tell me that the reward that i have choose is not avaiable and i cant fund the project.

Please fix this problem, i attach a screenshot (there arent rewards but it tell me that the reward is not avaiable and i cant fund).

Best Regards