Integriity: Problem loading X.509 certificate -65 After installing Ubuntu

[mahesh]

Hi, i'm new with Linux!
I bought a notebook that came with Satux installed on it and i changed to Ubuntu.
After the installation of Ubuntu, i get "[ 0.16033] integrity: Problem loading X.509 certificate -65
/dev/nvme0n1p2: clean, 231092/15597568 files, 4183345/62383360 blocks" every time i turn on my pc.
I tried to check my disk using shell command and it looks fine, i also tried to enable secure boot, but didn't work either.
Can some one help me with that?