Hi Mohamed Riyaz,
According to the screenshot, seems you are on WSUS 3.0, if yes, please check the version of the WSUS server:
WSUS 3.0 (SP2): Build 3.2.7600.226
WSUS 3.0 (SP2) + KB2720211: Build 3.2.7600.251
WSUS 3.0 (SP2) + KB2734608: Build 3.2.7600.256
WSUS 3.0 (SP2) + KB2828185: Build 3.2.7600.262
WSUS 3.0 (SP2) + KB2938066: Build 3.2.7600.274
If it's not on .274, please install KB2938066 to upgrade the WSUS server.
Besides, please run Server Cleanup Wizard on the WSUS server, if it still not work, you may try reindex WSUS database:
https://technet.microsoft.com/en-us/library/dd939795(v=ws.10).aspx
Best Regards,
Anne
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