Impossible to a user to perform a first connection when using multiple website/store/view

[lemmel]

Hi.

On a fresh installation of Magento, and after creation of multiple store/website, a newly created customer can't perform a first connection: he will get Something went wrong while saving the new password

I already found a ticket that is close or nearly the same of mine (see #5726), but in my case I'm not event trying to reset a password: the customer could not set one password, so it seems that Magento is not fonctionnal with multiple store/website (I could import/export user on need to change a password, but there, it isn't even possible to the customer to do a first connection).

Preconditions

• magento: 2.1.7-2017-05-30-02-18-42
• nginx: 1.10
• PHP/FPM: 7.0, with modules: bcmath, cache-lite, curl, fxsl, http-request2, igbinary, intl, json, mbstring, mcrypt, memcached, msgpack, net-url2, pear, soap, xml, xml-htmlsax3, xml-rpc2, xml-svg, yac, yaml, zip, gd, mysql, readline, zip
• MariaDB: 10.1.23
• OS: debian stable

Steps to reproduce

• Make a fresh install (without any example data)

• Creation of multiple Web Site/Store/Store View like this:
  

• Creation of one customer

• Use of the mail "Welcome to Main Website Store" sent to the user and try to set a password.

• You get : Something went wrong while saving the new password.

Expected result

One should be able to set a password.

Actual result

One can't set a password:

More informations

here are the log of /magento/var/log : log.tar.gz
I can provide a ready to use virtualbox VM

[magento-engcom-team]

@lemmel, thank you for your report.
We've created internal ticket(s) MAGETWO-80891 to track progress on the issue.