Work Flow Event Linkage Deactivated

Dear Friends,

Here i have one situation i.e usually we did the mail triggering functionality to info record approval. it was working over a year. but today morning itself mail is not triggering . when i check the event trace via SWEL . its coming like linkage deactivated. we didnt transported any any request and all. for your reference Please go through the below screen shots.

Its is an top most urgent .. Please any one suggest me rectify the Error.

Regards,

Thangam.P