Decryption error after upgrade

[crysper]

I have a custom built version of caddy 2.3.0-beta which i included your library. Everything worked fine until I downloaded the pre-built caddy 2.4.6 version. when i tried to upgrade, we got this error right after we reloaded the service:

[ERROR] While deleting old OCSP staples, unable to load staple file: unable to decrypt data for ocsp/...
for each domain.

Seems like an encryption error... did any changes happen there in the last 12 months?

this is the only thing we have related to this module in Caddyfile
storage redis { host {$REDIS_ADDRESS} }

[gamalan]

I remove the default encryption key, so you need to set it manually.