hi oNek
This can be due to a corruption of the certs (usually due restoring a backup made with tar flash instead of backup flash between two different controllers) or a failure of the TPM itself.
The steps you can follow to try and recover are:
a> collect output of "show tpm error"
b> write erase all (make sure to take backup using backup flash, copy out licenses etc, or just reconfigure all)
c> reboot
If still not fixed, then log a ticket with TAC showing steps a~c above and request RMA due to failed TPM.
Just to clarify, do not use tar flash for moving configs between controllers, it is purely for Aruba debugging.
regards
-jeff