ZodError in Langfuse worker

I just followed this tutorial to try and set up the local ai package. However, the langfuse worker keeps rebooting with an error.

ZodError: [
{
"origin": "string",

"code": "too_small",

"minimum": 64,

"path": [

  "ENCRYPTION_KEY"

],

"message": "ENCRYPTION_KEY must be 256 bits, 64 string characters in hex format, generate via: openssl rand -hex 32"
}
]

Any suggestions?