Install libtcl8.5 by entering the following commands in the terminal:
sudo apt update sudo apt install libtcl8.5
Description:
Tcl (the Tool Command Language) v8.5 - run-time library files
Tcl is a powerful, easy to use, embeddable, cross-platform interpreted scripting language. This package contains the Tcl library and auxiliary code which allows one to run Tcl-enabled applications. This version includes thread support.
Homepage: http://www.tcl.tk/
Version: 8.5.19-4
Section: universe/libs