It may be something alien to the dbir prooject, but I cannot read the rda files (for example [dbir_figure_data_rev2022_v1.Rda). I assume the file it contains the data underlying the graphs and that it is a R file. I load the file with commeand load and I get this weird message that don't know how to handle.

dbir_figure_data_rev2022_v1.Rda" :
bad restore file magic number (file may be corrupted) -- no data loaded
In addition: Warning message:
file ‘dbir_figure_data_rev2022_v1.Rda’ has magic number ''
Use of save versions prior to 2 is deprecated

Have you heard about it before? can you help me with it? Many thanks, Jose Ramon