Loading of Flux model using BSON: Tracker not found error?

I am having difficulty loading a BSON-saved Flux model via:

BSON.@load “my_model.jls”

resulting the error

ERROR: LoadError: UndefVarError: Tracker not defined

even though I had explicitly loaded Tracker via

using Flux.Tracker

Does anyone have a clue what this is about?

Alternatively, is there another (more reliable?) way to save Flux models?

PS Both machines were versions of Flux recently-loaded using Pkg.add in Julia 1.20
PPS above load attempted with Flux v0.1, saved model built with previous (but recent) version of Flux (v0.09?)

[BTW, please let me know if there is a specific Flux forum - I couldn’t find one]