3690541 - CSA extractors failed for Java systems due to the error MANSYS_LOGON_SCREEN - SAP Focused Run

The CSA Collector Framework status for a Java system displays the error message "MANSYS_LOGON_SCREEN" in the "Item Analysis" table column of the Configuration & Security Analysis - Administration application.
When checking the details of data collection for one of the affected configuration stores, the following information is shown:

Item Analysis: 0056 - MANSYS_LOGON_SCREEN
Processor Code/Message: 0
Extractor Code/Message: 0
Extractor Interface Code/Message: 12 - Collector exception: Exception performing SMPL action sapGroupAllAssignedUsers, object SAP_J2EE_ADMIN : The markup in the document following the root element must be well-formed. failed for [...].

SAP Focused Run (all versions)

CSA, JAVA systems, JAVA, MANSYS_LOGON_SCREEN, Configuration & Security Analytics, FRUN, Collector Framework, CF, CF status, SMPL, SAP_J2EE_ADMIN, SSI setup, monitoring user roles, SPML communication, sapGroupAllAssignedUsers , KBA , SV-FRN-APP-CSA , FRUN: Configuration & Security Analytics (CSA) , Problem