Downgrade identity server failure to FAIL_PROMPT instead of FAIL_ERROR
Spec for
@@ -299,7 +299,7 @@ specify parameter values. The flow for this method is as follows:
Validation for this URL is done as in the step above, but using
`/_matrix/identity/api/v1` as the endpoint to connect to. If the
`m.identity_server` property is present, but does not have a
- `base_url` value, then `FAIL_ERROR`.
+ `base_url` value, then `FAIL_PROMPT`.
{{% http-api spec="client-server" api="wellknown" %}}
