Hey, i'm new to creating terrain in Sketchup, but following instructions using Fredotools and Toposhaper went relatively well, until the second step in Toposhaper: creating the mesh from isocontours. Toposhaper generates an error and the operation is fully aborted.
I am using Toposhaper v2.6a in Sketchup Pro 2021 in Windows 10 Pro 64bit

Date: 06-Jul-22 09:36:34
An error occurred in CLEANSING
The operation is fully aborted

cannot hide layer that is a part of the active path

body_lib6tool.rbe: 2538 -- visible=
body_lib6tool.rbe: 2538 -- block in switch_to_temp_layer
body_lib6tool.rbe: 2537 -- each
body_lib6tool.rbe: 2537 -- switch_to_temp_layer
toposhapertool.rbe: 1391 -- change_view
toposhapertool.rbe: 1358 -- set_preview_working
toposhapertool.rbe: 544 -- cleansing_processing
toposhapertool.rbe: 523 -- after_selection
toposhapertool.rbe: 493 -- notify_edge_picked
body_lib6edgepicker.rbe: 539 -- call
body_lib6edgepicker.rbe: 539 -- notify_action
body_lib6edgepicker.rbe: 595 -- terminate_current_selection
toposhapertool.rbe: 658 -- execute_validate
toposhapertool.rbe: 387 -- handle_initial_selection
toposhapertool.rbe: 319 -- activate
toposhapertool.rbe: 133 -- select_tool
toposhapertool.rbe: 133 -- action__mapping
lib6plugin.rbe: 142 -- call
lib6plugin.rbe: 142 -- launch_action
lib6plugin.rbe: 244 -- launch_action
bootstrap_toposhaper.rbe: 83 -- launch_action
bootstrap_toposhaper.rbe: 149 -- block in startup
lib6plugin.rbe: 1461 -- command_invoke
lib6plugin.rbe: 1441 -- block (2 levels) in build_config_commands
lib6traductor.rbe: 1378 -- block in add_command

I would be happy to see a solution to this!