Commas in query string

I can’t get commas to work in a where condition.

The categories should be:
Freedom of information and expression
Data quality, sharing and security

I’m sending this to the API:

(Country,isnot,null)~and(Country,in,Kenya)~and(Policies,in,Freedom of information and expression,Data quality%2C sharing and security)

But noco does not like %2C. Doesn’t mind %20 though.

Any ideas would be much appreciated.