Populate non ascii password in a file using puppet

I am trying to populate a password with non ascii characters into a template file using puppet. I have ecoded password with non ascii to base64 and placed it in hiera-esecrets. When I try to decode the password in template it was not working.

puppet

    class abc::container (      $key_encrypt       = hiera('abc::configs::key_encrypt', undef), ){    @docker_container { "${app}:${version}":        files                 => {       'configuration.properties'    => {            destination                   => '/opt/configuration.properties',             mount_mode                   => 'rw',             owner                        => 'root',             group                        => 'root',             mode                         => '0755',             content                      => template('abc/configuration.properties.erb'),       },     }, }

configuration.properties.erb

<% require 'base64'key_encrypt = @key_encrypt key_encrypt_d = Base64.decode64(key_encrypt) %> master.key.2024-08-22-02-05=<%= @key_encrypt_d %>

Below is the error when puppet gets executed

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Failed to parse inline template: invalid byte sequence in US-ASCII

All I see is the base64 encoded value in the template file. I want to get the actual password.