docolli

Check “Audience” -> “Manage Lists”. There should be at least one list.
Then check your Form, you should have checked at least one list.
Also check your campaign for the list selected.

With Lists you can manage several subscribtions forms and where the subscribers are put on which list. Then you can use this to select for which list, which action (e.g. sending of blog post notifications) is taken.

If you have only one form for one action, you only need one list.

Currently only Czech, Great Britain and Netherland translations are available as files under wp-content\languages\plugins. However, the files are from 2017 and 2018, so I am not sure, if they work with 4.0.0 anyhow.

There are >2000 suggested german translations waiting for release. However, they have lots to do to fix their bugs with Version 4.It getting better, but I’d love to see that translations are released soon.

But you can edit all the text that will be send to users, so at least here you can localize it to your needs.

Your error gives a hint, where the problem comes from. It is line 478 in es-register.php. Check here: https://plugins.trac.ww.wp.xz.cn/browser/email-subscribers/tags/3.5.18/classes/es-register.php

It is a problem in the function “es_upgrade_database_for_3_2”. I don’t know why you are running through this code (I am no programmer of this plugin), since you have upgraded from 3.5.18 to 4.0. Or have you started from a lower version?

Well, the function above in row 442 shows how it is decided, what has to be done with the database.

if ( get_option( 'current_sa_email_subscribers_db_version' ) === false ) {
                        es_cls_registerhook::es_upgrade_database_for_3_2();
               }

So, it seems the option “current_sa_email_subscribers_db_version” is missing in your database.

I hope your database is not corrupt with respect to email subscribers values.