E5108: Error executing lua: .../.config/nvim/lua/astronvim/utils/buffer.lua:72: attempt to concatenate local 'bufnr' (a nil value)
stack traceback:
.../.config/nvim/lua/astronvim/utils/buffer.lua:72: in function 'close'
.../.config/nvim/lua/astronvim/mappings.lua:49: in function <.../.config/nvim/lua/astronvim/mappings.lua:49>