Earlier quoted context omitted.
Interesting, I am not familiar with the job situation in France so I was basing the sentence on this quote from the article "Second, it has often been blamed for providing an incentive to give up looking for a job". It sounds like whether or not the statement is true as you mentioned basic income still provides an overall benefit.
UBI doesn't disincentivize work. If I told you that I would give you $10k/year unconditionally, would you quit your day job? What if you were currently unemployed, would you stop looking for a job? There is no reason to as my payment to you doesn't depend on if you get a job or not.
This is a major disincentive of work.