Shoutbox does not load shouts in SMF 2.0.12

[Chip (OP)]

see http://simpleportal.net/index.php?topic=14380 and http://www.simplemachines.org/community/index.php?topic=548902.msg3893084#msg3893084

error:

2: Invalid argument supplied for foreach() in /var/www/html/Sources/Subs-Portal.php Line: 1286


SMF 2.0.12 Changelog                                            July 7, 2016
===============================================================================
 ! Fixed word censor injection by disallowing an empty 'proper word'
 ! Fixed vulnerable unserialize() code by converting all instances to safe_unserialize()
 ! Added a more thorough safe_unserialize() function to prevent object injection
 ! Fixed a bug where leaving a custom profile field blank on registration that has an email mask would throw an error
 ! Fixed PayPal integration to comply with the new forced SSL
 ! Fixed a bug where notifications were sent for messages in inaccessible boards
 ! Fixed editor to make the editor work with Microsoft Edge
 ! Fixed issue where smiley popup is blank on iOS 9 devices
 ! Fixed WYSIWYG editor in mobile devices
 ! Fixed an undefined $_POST['icon'] in Sources/Post.php
 ! Fixed a minor bug in Login2()
 ! Fixed an issue where SMF doesn't recognize new domain names and considers these as invalid
 ! Fixed an issue where SMF would allow empty BBC
 ! Fixed an issue where theme variants could not be selected
 ! Fixed an issue where the file version of Subs-Post.php could have been 2.0.8 or 2.0.11. It will be updated to 2.0.12 in either case.
 ! Updated copyright year to 2016

[Chip (OP)]

2.0.12 deferred as 2.0.13 is being built. Turning the Shoutbox cache off is a workaround (in dev.)