According to the Signable status page, maintenance is completed.

Signable - the third party doing our integrated digital signing - is carrying out routine scheduled maintenance on their servers. You may experience errors when submitting a new signing and if anybody tries to sign a document.

It is expected to last 4 hours from 2 pm today.

You can monitor progress directly on the Signable status page: https://status.signable.co.uk.

We will update here if we see their status page change.