@leocg I should contact the site owner. Which I haven't been able to do for three weeks. Since then I have not found a device that would open the Opera website. In private and in the public sector. So the fault will not be on our side, and if it is, it is nationwide.
As possible causes of error 429 I found this
Servers are undergoing maintenance - maintenance for several weeks?
Unnecessary browser extensions - I don't have extensions
Website cache and cookies - cleared
Bad internet connection - with all providers?
Ad blocking is active - not all browsers have blocking
Does your computer have viruses - across all users, platforms and stations?