File is using an ECC (Elliptic Curve Cryptography) certificate
Agent is not expecting a certificate type with a MinKeyLength of less than 512.
Enhancements in both Server 8.10.0 (EP-14539) and Agent 8.9.2 (EP-17727) introduce support for varying algorithms and certificate key sizes. Upgrading to these versions (or higher) will permanently resolve this issue.
RSA and ECC Certificate Key Size settings are managed via System Configuration > Advanced Options > Certificate Options.
Agent support for these settings was introduced with the release of Agent 8.9.2.
An alternative Approval Method (Hash Approval, Custom Rule, etc) will be required until upgrades are complete.
Some certificate types have different key lengths based on how they were designed