I want to report that during the captcha phase in the freespin interface, sometimes there is the google recaptcha, sometimes another one I don't knwo the name.
When there is the google recapthca, a red message says "to site owner, invalid site key", the captcha is not functional. One or two refresh of the page usually loads the other non-google captcha that works.
I confirm the issue. It is very rare, but it happens. For me, single refresh usually solves the problem.
And one more extra remark - uBlock Origin sometimes complains (maybe it is just a my configuration) about 'aws tracking' url - the most probably 'tracking' word is not very liked by the plugin.