Lock rings type Shimano and SRAM can not be screwed on the freehub

I am trying to install a Sun Race cassette - 8 cogs on a new Tacx Neo 2T, having T2875-01 type of freehub. The cassette fits ok, but the lock ring does not fit: it can be screwed only 0.3 - 0.5 rotation and it blocks (although I know it is "Shimano type"). I also tried a lock ring from 11 cogs SRAM road cassette (Force 22), but it behaves the same.

It is like Neo 2T freehub internal diameter is a little too small (maybe with 0.1-0.2 mm), or its thread pitch is not standard and does not match my lock rings. I did not try to force screwing.

What could be the solution?

Thanks