A chartsheet is a special type of sheet that handles charts output. You must add a chart to the sheet. Otherwise, this will break the workbook.
wb_add_chartsheet(
  wb,
  sheet = next_sheet(),
  tab_color = NULL,
  zoom = 100,
  visible = c("true", "false", "hidden", "visible", "veryhidden"),
  ...
)A Workbook object to attach the new chartsheet
A name for the new chartsheet
Color of the sheet tab. A  wb_color(),  a valid color (belonging to
grDevices::colors()) or a valid hex color beginning with "#".
The sheet zoom level, a numeric between 10 and 400 as a percentage. (A zoom value smaller than 10 will default to 10.)
If FALSE, sheet is hidden else visible.
Additional arguments
wb_add_mschart()
Other workbook wrappers: 
base_font-wb,
col_widths-wb,
creators-wb,
grouping-wb,
row_heights-wb,
wb_add_data(),
wb_add_data_table(),
wb_add_formula(),
wb_add_pivot_table(),
wb_add_slicer(),
wb_add_worksheet(),
wb_base_colors,
wb_clone_worksheet(),
wb_copy_cells(),
wb_freeze_pane(),
wb_merge_cells(),
wb_save(),
wb_set_last_modified_by(),
wb_workbook()