Hello everybody!. I'm having some issues trying to round some corners and edges. This is the output:

Date: 15-Jun-23 16:56:28
An error occurred in FredoCorner
An error occured in the Ruby code

undefined method `[]' for nil:NilClass

fredocorneralgo.rbe: 2316 -- brane_free_chemin
fredocorneralgo.rbe: 2061 -- block in catena_process_branes_protected
fredocorneralgo.rbe: 2047 -- each
fredocorneralgo.rbe: 2047 -- catena_process_branes_protected
fredocorneralgo.rbe: 2009 -- block in catena_process_branes
fredocorneralgo.rbe: 2008 -- catch
fredocorneralgo.rbe: 2008 -- catena_process_branes
fredocorneralgo.rbe: 965 -- block in solid_construct_branes
fredocorneralgo.rbe: 964 -- each
fredocorneralgo.rbe: 964 -- solid_construct_branes
fredocorneralgo.rbe: 919 -- block in solid_reconstruction
fredocorneralgo.rbe: 918 -- each
fredocorneralgo.rbe: 918 -- solid_reconstruction
fredocorneralgo.rbe: 883 -- solid_add_remove_edges
fredocornertool.rbe: 1840 -- selection_change
fredocornertool.rbe: 1828 -- selection_add_remove_edges
fredocornertool.rbe: 1868 -- selection_mouse_up
fredocornertool.rbe: 2300 -- onLButtonUp

Any ideas?