Encryption configuration issue

[Rod Widdowson]

> 2020-07-29 11:35:57,343 - 10.42.0.200 - WARN
> [org.opensaml.xmlsec.impl.BasicEncryptionParametersResolver:234] -
> Validation failure: Failed to resolve both a data and a key encryption
> credential


>     <KeyDescriptor use="signing">

But no <KeyDescriptor use="encryption"/> ?