SMA log reports errors warnings for each package:
_com_error exception: Cannot save package The system cannot find the file specified.. The I/O operation failed (0x80043005)
CAeXNSCPkgSvr::UpdatePackage failed. Cannot save package The system cannot find the file specified..
Package Server 8.7.3
Corruption in secure storage (missing file)
Rebuilding of secure storage from scratch