Hello Steven,
Thanks for your reply.
I didn’t use Juliaup, I downloaded from here: Download Julia and ran the native installer (or rather, the IT dept. did). This was how we installed both v1.6.7 & v1.9.2, and as mentioned above, both have similar precompile issues (albeit with different packages failing).
I’ll look into using Juliaup this week and let you know if it works!