Can't generate an API key

When I try to generate an API key on Setup/Get API Key using the Generate API Key button no new key is generated. In the console it shows the following error:

vendor-27545368-39f6391d.js:2     POST https://api.ngc.nvidia.com/v2/users/me/api-key 451
t @ vendor-27545368-39f6391d.js:2
(anonymous) @ vendor-3113a0cb-3bec4a7d.js:2
M @ main-4a723af6.js:1
(anonymous) @ main-4a723af6.js:1
(anonymous) @ vendor-27545368-39f6391d.js:2
t._trySubscribe @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
t.call @ vendor-27545368-39f6391d.js:2
t.subscribe @ vendor-27545368-39f6391d.js:2
(anonymous) @ main-4a723af6.js:1
(anonymous) @ main-4a723af6.js:1
(anonymous) @ main-4a723af6.js:1
(anonymous) @ main-4a723af6.js:1
onPrimaryButtonClick @ main-4a723af6.js:1
onClick @ kaizen-ui-ad87e545.js:1274
u @ vendor-f80d2ba7-8d3a58c4.js:2
f @ vendor-f80d2ba7-8d3a58c4.js:2
(anonymous) @ vendor-f80d2ba7-8d3a58c4.js:2
v @ vendor-f80d2ba7-8d3a58c4.js:2
at @ vendor-f80d2ba7-8d3a58c4.js:2
rt @ vendor-f80d2ba7-8d3a58c4.js:2
it @ vendor-f80d2ba7-8d3a58c4.js:2
pt @ vendor-f80d2ba7-8d3a58c4.js:2
Y @ vendor-f80d2ba7-8d3a58c4.js:2
z @ vendor-f80d2ba7-8d3a58c4.js:2
$t @ vendor-f80d2ba7-8d3a58c4.js:2
Gt @ vendor-f80d2ba7-8d3a58c4.js:2
e.unstable_runWithPriority @ vendor-27545368-39f6391d.js:2
Qo @ vendor-f80d2ba7-8d3a58c4.js:2
R @ vendor-f80d2ba7-8d3a58c4.js:2
Kt @ vendor-f80d2ba7-8d3a58c4.js:2
o @ vendor-27545368-39f6391d.js:2

This is an error 451 (“Unavailable due to Legal Reasons”). What causes the issue and how can I fix it? The account is new and was created for the purpose of getting an API key to set up the containerised version of Omniverse.