[horde] Class "Horde_Memcache" not found

[Brent]

  Quoting Andreas Mauser <andreas at mauser.info>:

> Hi,
>
> further configuring my new Horde 6 installation I fell over this  
> error message, which I cannot get rid of:
>
> Class "Horde_Memcache" not found
>
> Already installed by composer required horde/memcache but still I  
> get this error.
>
> Can someone please help me here?
>
> Best regards,
> Andreas
>
> --
> Horde mailing list
> Frequently Asked Questions: http://horde.org/faq/To unsubscribe,  
> mail: horde-unsubscribe at lists.horde.org

Memcached is a system-installed component and can speed the use of  
Horde.  Do you have the component installed?

$ composer show -i | grep memcache

horde/memcache                         dev-FRAMEWORK_6_0 bb84ab7  
Memcache client library

Did you have memcache enabled?

Administration->Configuration->Horde->Distributed Hash Table

Configuration for horde to use your memcache server are here.

brent