Stack level too deep - ActionMailer Preview with wicked_pdf

[stewgloves]

Issue description

I am using wicked_pdf to attach a PDF to an email. I have managed to get the solution working however when trying to preview the email/pdf using ActionMailer preview. I am hit with a 'stack level too deep' error caused by a call to

method(:render).super_method.call(options, *args, &block)

Steps to reproduce:

install gems - wicked_pdf & wkhtmltopdf
rails g wicked_pdf
Access rails/mailers

Any help would be much appreciated!

Expected or desired behaviour

When accessing the rails/mailers/ I will be shown my mailers to preview.

System specifications

Rails 6.1.4.4
wicked_pdf 2.1.0
wkhtmltopdf-binary 0.12.6.5

wicked_pdf gem version (output of cat Gemfile.lock | grep wicked_pdf):

wkhtmltopdf version (output of wkhtmltopdf --version):

whtmltopdf provider gem and version if one is used:

platform/distribution and version (e.g. Windows 10 / Ubuntu 16.04 / Heroku cedar):

[stewgloves]

Closing as duplicate of #810