You must specify a value for :client_id_2 in the JWT

Why Metabase showing You must specify a value for :client_id_2 in the JWT.

In my app, the value is also error.

Hi @shaonyuvi
Because you have set two parameters to be locked, which means you have to provide the value for them.
I would recommend reading through https://www.metabase.com/docs/latest/embedding/signed-embedding

Can't I use two or more locked parameters?

@shaonyuvi You can use as many as you want, but you'll need to include the locked parameters in your embed code, since you are controlling those.