The Danish authentication provider NemID is currently having an incident which they are working on resolving. The effect for Scrive users is that some NemID-transactions are unsuccessful and resulting in an error.
Workaround: If you urgently need to send a document and the recipient is unable to sign using NemID, you have the possibility to select a different authentication method by opening the document in the e-archive and selecting the party, then Change. Note however that the chosen method might have an impact on the signature's level of trust (e.g. simple or advanced electronic signature).