[Radiant] Possible Source of Mailer Failure

[1842759193]

Just running through the production.log again when I noticed

NoMethodError (undefined method `symbolize_keys' for nil:NilClass):
/var/www/fourwalls/vendor/extensions/mailer/app/models/mailer_page.rb:26:in
`process'

Thought I'd start there for specific files issues:

sudo nano
/var/www/fourwalls/vendor/extensions/mailer/app/models/mailer_page.rb

Line 26: @form_conf = config['mailers'][form_name].symbolize_keys || {}

So referring to the error output, this method 'symbolize keys' is undefined
and throws an error straight up.

I'll make some other enquiries re this in ruby forums etc but could the
author of the Mailer Extension (Matt?) have a look at this?

Thanks in advance, 1842759193