[horde] Issue when trying to use admin interface in recent update

[Mike]

I recently did a composer update and got this message when trying to  
access the admin interface.

Cannot create Horde\Core\Service\VersionCheck\VersionService Root  
cause: Interface "Psr\SimpleCache\CacheInterface" not found
in /var/www/horde6-beta/vendor/horde/injector/src/Injector.php:513

  1. require_once() /var/www/horde6-beta/web/horde/admin/config/index.php:3
  2. Horde\Injector\Injector->getInstance()  
/var/www/horde6-beta/vendor/horde/horde/admin/config/index.php:88
  3. Horde\Injector\Injector->get()  
/var/www/horde6-beta/vendor/horde/injector/src/Injector.php:627
  4. require_once() /var/www/horde6-beta/web/horde/admin/config/index.php:3
  5. Horde\Injector\Injector->getInstance()  
/var/www/horde6-beta/vendor/horde/horde/admin/config/index.php:88
  6. Horde\Injector\Injector->get()  
/var/www/horde6-beta/vendor/horde/injector/src/Injector.php:627
  7. Horde\Injector\Injector->createInstance()  
/var/www/horde6-beta/vendor/horde/injector/src/Injector.php:466
  8. Horde\Injector\Binder\Factory->create()  
/var/www/horde6-beta/vendor/horde/injector/src/Injector.php:409
  9. Horde\Core\Factory\VersionServiceFactory->create()  
/var/www/horde6-beta/vendor/horde/injector/src/Binder/Factory.php:125
10. Horde\Core\Factory\VersionServiceFactory->createAvailableSource()  
/var/www/horde6-beta/vendor/horde/core/src/Factory/VersionServiceFactory.php:57
11. Composer\Autoload\ClassLoader->loadClass()  
/var/www/horde6-beta/vendor/horde/core/src/Factory/VersionServiceFactory.php:81
12.  
{closure:Composer\Autoload\ClassLoader::initializeIncludeClosure():575}()  
/var/www/horde6-beta/vendor/composer/ClassLoader.php:427
13. include() /var/www/horde6-beta/vendor/composer/ClassLoader.php:576

Was able to correct it by adding:

composer require psr/simple-cache

Hope this helps someone.

Mike