passwordgorilla not working on 18.04

I just upgraded Ubuntu to 18.04 and now passwordgorilla does not work. Doing a
search I find a problem that states TCL needs to be installed for 18.04.

bob@Saturn:~$ sudo apt install tcl
[sudo] password for bob:
Reading package lists... Done
Building dependency tree
Reading state information... Done
tcl is already the newest version (8.6.0+9).
tcl set to manually installed.
The following package was automatically installed and is no longer required:
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Shows TCL is already installed.

Any suggestions on what to do next?