Hi,
Can you please login in SICF and check the service .
/default_host/sap/bc/webdynpro/sap/APPL_SOAP_MANAGEMENT
Please check if you are affected as mentioned in the below note.
Note 1360977 - Transaction SOAMANAGER is not working
Note 1124553 - Inaktive ICF services of Web Service runtime
Note 1459665 - Null pointer exception in SOAMANAGER
Thanks
Rishi Abrol