VPN Performance & Scaling for OpenVPN and IPSec on pfsense

Right around 6:22 in the video, In Encryption Algorithm camp you had AES-256-GCM, but I had AES-128-CBC, when I changed it, the pfsense crashed the network and stop giving internet access. I had to restore a previous config using the listed n 15 on the real hardware pfsense is on, couldn’t even access the gui on the lan. was it because I didn’t add it to on the NCP Algorithms Allowed camp? It would say constantly on the terminal “re0 watchdog timeout” re0 being the wan port