Hello, friend!
At first, I checked whether the ONT version was the carrier version and the enterprise version. Later, I confirmed that the enterprise version on the OLT was compatible with both the carrier ONT and the enterprise ONT. As you can see, the OLT version matches the ONT version. Therefore, the fault is not caused by the version.
Check whether the ONT configuration on the OLT is correct. Maybe you can register the ONT in another way.
Thanks!