I tried using this free box from Betfury and I can't withdraw any coins with this new hCaptcha word system and I tried so many times so I don't know what could be issue here.
Image hCapthas worked just fine when I used them on other websites.
EDIT: I finally managed to do it after restarting and refreshing my browser.
Sometimes, hCAPTCHA can be a pain in the ass especially with the pants length. I honestly miss reCAPTCHA but now with Google charging for their services, it's rarer to see it in casinos nowadays.