The All-in Signing Server certificate had to be renewed. In addition, the Issuing CA was also renewed. If the issuing certificate is not automatically updated in the Trust Store of the signature application, the new issuing CA can be found under the following link (https://swisssign.net/cgi-bin/authority/download/ACD03AC2C25755916911CC706A59388A8CAC9C3D.pem). This would have to be updated in the Trust Store of the signature application. The necessity of this configuration depends on the integration and software used.