Employee Replication Error - An exception with the type CX_SY_INVALID_REGEX

Hello All,

We hit the wall trying to figure this out any guidance will be much appreciated.

We just applied support packs for S/4HANA 1709 SPS08, We are unable to run employee replication ( EC to S4 HANA) - We are getting the below error message when replicating.

An exception with the type CX_SY_INVALID_REGEX was raised, but was not handled locally or declared in a RAISING clause.

Message no. ECPAO_IN_PROCESSING055