Install libtcl8.6 by entering the following commands in the terminal:
sudo apt update sudo apt install libtcl8.6
Description:
Tcl (the Tool Command Language) v8.6 - 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: 8.6.8+dfsg-3
Section: libs