Can't take offer because of payment method

I cannot take Western Union offer, although I created a WU Account in Bisq.
The Offer is grey nonetheless.
Why ?

Is your Western Union account fiat currency the same as that of the offer?

Yes its the same currency

Have a look at the age of your WU account in Bisq > Account > National fiat accounts.

If recently set up it may be limited to smaller offers until it ages enough