[Freeswitch-users] Odd issues with WebRTC and WSS

Hello, I am running two servers, one (A) with ref 6c0f18d960, the other (B) with ref 0074589311, and the configuration is copied over verbatim. Certificates have been built using Letsencrypt, with the same script on both boxes. On server A, any WebRTC client that tries to initiate a call gets a "switch_core_cert.c:209 FP FILE ERR!" and the call immediately goes down. The issue is present whether I test with Verto Communicator or my Verto-based custom client. Where could I start looking? The logs are not very helpful, it seems. Thanks! Luca Pradovera