Error shown in 'Eval result' when I use Bayesopt function

The codes run well, but the Eval result shows 'Error' and Bestobserved shows 'NaN'. But when I use the numbers it gives, I can calculate an outcome myself. So what's the problem here. I don't really understand the error here.

[Bhavana Ravirala]

Hi Chen,

Can you provide reproduction steps or the code which produces the error. So that I can get a better understanding about the error.