Hei,
I need to find the documentation for the NRF SDK 1.8, there's a page which has links to all the documentation versions:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/
However, if you click the 1.8 (and I suspect many of the others, too) - which points to: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.8.0/ - it's not available.
It should probably point to: https://docs.nordicsemi.com/bundle/ncs-1.8.0/page/nrf/documentation.html or thereabout.
Should be easy to fix.
Best Regards.
Janne