The default browser certificate for Tomcat expired in February of 2023:
Release : 16.0
The default certificate is provided with every installation, but it is expected that customers will generate a unique certificate for their environment, upon installation.
In this case, it is necessary to create a unique certificate that is not expired, as per this Help Topic: About browser certificates (broadcom.com)
It is also possible to create a signed certificate for the Enforce Server browser.
For more information on that, please see: Create, sign, and import an SSL certificate signed by a Trusted Certificate Authority for the Enforce Server certificate (broadcom.com).
This has been recorded as a defect, and it is expected to be fixed in a future release of DLP: DLP-74203.