Funding does not work

Last version 4.1.7

With Reward System ON at Theme Options
– It does not let me fund anything if the project does not have any rewards. It shows error “The reward you choose is no longer available”. (this worked on previous versions 3.x)
– If you choose the lower reward but the funding amount is lower, it shows error “You need to fund more for this reward”. It should let you fund without getting any reward.

With Reward System OFF:
– It still show the error “The reward you choose is no longer available”. What the…?

Please help.