Summary
The Spider setup reports an that an incompatible customizing was detected.
Cause
Customer-specific components such as plug-ins and services created for Spider 6.2 or earlier will no longer work after updating to Spider 6.3, since downward compatibility is not supported here.
It is absolutely necessary to have these components adapted to the current version of Spider.
Customer rules originally created for a Spider version older than 6.1 should checked for technical compatibility.
Resolution
Please contact the creator of the customization to check if it can be made compatible.
(Optional: See Consulting services blog here)