On this line, about VRM, it says

Lateritic soils are known to exhibit strong viscous remanent magnetization (VRM) (link).

where the link is no link at all. This text ((link)) should either be removed or, preferably, the links should be added:

https://github.com/geoscixyz/em/blob/main/content/geophysical_surveys/uxo/interpretation.rst?plain=1#L91