How can the option for the password of the advertisement be added to the required fields?

That will not be supported by plugin, you might edit file with required fields formulas for javascript and just add one for password field.

Which file should I edit?

Please tell me which file is the one I need to edit and add field for required password

You should be able to edit item-post.php and find pattern for required inouts via jquery validation.

I don't know how to do the editing you suggest. This is the end of my own effort, thanks for the replies and I suggest you add such a feature to this plugin in the future.

In the end it was too easy. I added this word " required/" and "minlength="6"" here:  File oc-content/plugins/backoffice_manager/form/form_passwrd.php


and it works perfectly.

This message that comes out "Please enter at least 6 characters.", in which file is it? I want to translate it but I can't find it

Please an answer to the last question

It's browser message that cannot be translated and always shown in user browser language.
It's not optimal solution as you mixing HTML5 validation and jQuery validation.

Ok Thanks

This message: "Please enter at least {0} characters."

located in this file:

oc-content/themes/beta/js/jquery.validate.min.js

If I change it to a different language directly in the file, will it cause a problem?

I want to do this because it doesn't translate automatically.

No if you do not change that file on update.

Ok Thanks