HTTP error response : Object Not Found : soap/rpc, In MWS Monitor interface

Hi All,

I have an issue in MWS Monitor interface : when Clicking “process instances” or “services” in the left panel i have this error :

java.rmi.RemoteException: HTTP error response: Object Not Found (soap/rpc)

The MWS log file isn’t more verbose :
(jsf:INFO) [RID:841] - HTTP error response: Object Not Found (soap/rpc).

In the IS side log :
2019-05-16 15:58:49 GMT [ISC.0039.0001D] POST /soap/rpc
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- Host: nnn.nn.nnn.nn:5555
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- Connection: Keep-Alive
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- User-Agent: TME-GLUE/8.0
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- SOAPAction: “”
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- Content-Type: text/xml; charset=UTF-8
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- Content-Length: 782
2019-05-16 15:58:49 GMT [ISC.0038.0002D] <-- Authorization: SAMLart:****
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> HTTP/1.1 404 No such object: soap/rpc
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> Content-Type: text/html
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> X-Frame-Options: SAMEORIGIN
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> Cache-Control: no-cache, no-store
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> Pragma: no-cache
2019-05-16 15:58:49 GMT [ISC.0038.0002D] --> Content-Length: 83

I noticed : SOAPAction: “” , which i suspect, it seem that like MWS sends wrong parameters or incomplete request to IS.

this happened the first time after a restart of MWS.

WM version 9.7 (no update)

Any help or idea is welcome.
Thanks