Error in PF Registration on Shram Suvidha Portal - Invalid Certificate. Also, E-sign is not working

c v kale
There is error in Shram Suvidha portal on new PF ESI registration while signing with DSC as Invalid Certificate. Also, E-sign is not working.
I tried all browsers and different java versions on different machines.

No reply given by the help desk on mail and telephone no provided on the portal.
However other PF documents approval with DSC are working fine.

Please guide for the suitable solution.
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