Hello, I purchased third-party  module "Sale Confirmation backdate.

Sale Confirmation backdate | Sale back date | Sale Past Confirm Date

by DevIntelle Consulting Service Pvt.Ltd

But I could not install module because of the error code below.

"Error while importing module 'dev_sale_confirm_date'.

Module loading dev_sale_confirm_date failed: file /tmp/tmpj8n_ahx4/dev_sale_confirm_date/security/ir.model.access.csv could not be processed:

No matching record found for external id 'model_dev_sale_confirm' in field 'Model'

Missing required value for the field 'Model' (model_id) "

I checked help forum and It seems some people guide about how to solve similar issue.

But I don't have any knowledge about programing at all, I have no idea which files and how do I need edit in my case...

Could anyone guide by step by step to easy to understand how to activate your module?

(At least I could go to see Settings->Technical-> Models by developer mode)

Thanks.