From March 27 we'll be working with a new public certificate. In most cases this is automatically trusted. Is your API installation no longer working? Then first remove the old private certificates and the certificate chain. If it still doesn't work, download the public certificates below and install them manually.

Certificates used 
Root CADigiCert Global Root G2
Intermediate CADigiCert G2 TLS EU RSA4096 SHA384 2022 CA1
TLS Certificateapi.kvk.nl

Are the APIs not working?