The following string contains two ">":

    'CONTACT_US_ENABLE_EXPLAIN'        => 'This page allows users to send emails to board administrators. Please note that board-wide emails option must be enabled as well. You can find this option in General > Client Communication > Email settings.',

Found in:

phpbb\phpBB\language\en\acp\board.php

 

But its used in HTML so should either be "& gt;" or find some other way of writing it.

 

I would not recommend writing "General > Client Communication > Email settings" because then translators would have to make sure those strings are the same in more then one place.

Would be better to use placeholders/variables to reuse the strings that have already been translated.

 

General > Client Communication > Email settings

To:

{L_ACP_CAT_GENERAL}

> {L_ACP_CLIENT_COMMUNICATION} > {L_ACP_EMAIL_SETTINGS}

Or how ever its done.

 

Perhaps make part of the text a link for easier access.

Maybe delete the "General > Client Communication > " if its made to be a link.