I didn't reproduce your problem, SerDes tool works normally on my side. Please check QCVS version from Help->Install new Software->already installed ->QorIQ Configuration and Validation Suite, please check whether the version is 4.5.0.0001-20160210, if no, please download QCVS 4.5 from QCVS offline installation packages for CodeWarrior for Power Architectures Rev 4.5.zip - Google Driv... , and install this package from Help->Install new Software->Add->Archive.
Thanks for the reply. Until I fix this problem, is there any other recommended way to check SerDes is working or not?( Consider that we don't have a working bootloader for now)