Error: No Context configured to process this request

[Kauko]

After updating the latest corrections to NW6.5SP7 our webmail has
stopped working and comes up with the following error:

message _No Context configured to process this request_

description _The server encountered an internal error (No Context
configured to process this request) that prevented it from fulfilling
this request._

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Apache Tomcat/4.1.36-LE-jdk14

Can anyone offer help how to fix this?