Hi @rkk
Can you check the permissions on your jwt keys:
sudo chown -r www-data:www-data /etc/passbolt/jwt
sudo chmod 755 /etc/passbolt/jwt
sudo chmod 600 /etc/passbolt/jwt/jwt.key
sudo chmod 644 /etc/passbolt/jwt/jwt.pem
Also are you able to access with your desktop to https://yourpassboltdomain/auth/jwt/rsa.json
This should return the public key.
Let us know
Best,
Max