i got the issue
before january i was sending the sha 256 in the csr cnfg file
but when you told us the issue is fixed i faced the issue of invalidd csr on generating ccsid but when i read out the comments the issue was fixed
then i did some rnd and change this sha 256 to sha256 just removed the space and it works well i onboarded 4 differenr entites on simulation without any error again
@techcoder you shoulfd also review your xv csr cnfg file