Invalid signature Error 403 - Docker

I have Cachet running via Docker and during the verify email stage,the instance gets redirected to "subscribe/verify" and returns a 403-Invalid Signature .
Error Message : Something went wrong on our servers while we were processing your request. Invalid signature.
Should i try to execute "php artisan key:generate" and "php artisan config:cache && php artisan cache:clear " from inside the container to resolve the issue?
Cachet Docker version: latest
Can you please help ?