(Feb 20, 2025) We just ran into this with Anaconda; in particular, its most recent geopandas is 0.14.2, which when selected for installation, automatically installs fiona 1.10 as one of its dependencies. Unfortunately as noted above, this triggers the error. Forcing geopandas to 0.14.4 is possible, but other things broke (including spyder). Things worked ok if you install the most recent geopandas and then separately downgrade the fiona to 1.9.5. (python v is 3.12).