Try to refresh your connection?
Now it shows:
Loading...
I've tried different IP addresses, all with the same result. I'm giving up for now.
That error has nothing to do with tor itself, but rather the browser you're using. Tor browser (and presumably "Tails Browser" which is a derivative of the former?) does not allow sufficient access to stuff such as the indexedDB, as mentioned.
If you CTRL + SHIFT + I it will probably say the following:
Uncaught (in promise) DOMException: A mutation operation was attempted on a database that did not allow mutations.
We've not found any "fix" for this yet as it seems to be a feature of the browser rather than a bug, but as mentioned previously, a browser which does not retain most data is not really that great to use in combination with moneypot in the first place.