When opening the guidebook, there's a loading error that says:

Error building entry spectrum:mod_integration/ae2 of book spectrum:guidebook
Error while building entry spectrum:mod_integration/ae2 page 1 of book spectrum:guidebook
Unkown item ID: ae2:quartz_growth_accelerator

Perhaps you meant "ae2:growth_accelerator"?

Fixed for release tomorrow

Looks like that block was renamed in 1.20, good catch!

same problem in zh_cn folder