$ ./crossover
Traceback (most recent call last):
  File "/nix/store/h7drzjkmgqxrg5r6rz1zmlmwiv0fyp8q-crossover-19.0.0/crossover/lib/python/checkgtk.py", line 46, in status
    gi.require_version(lib, version)
  File "/nix/store/q0dwz62vhpyrssvfdlcid889d6kdgvgw-python3.7-pygobject-3.32.1/lib/python3.7/site-packages/gi/__init__.py", line 129, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace Gtk not available
/nix/store/h7drzjkmgqxrg5r6rz1zmlmwiv0fyp8q-crossover-19.0.0/crossover/bin/cxdiag: line 3: /nix/store/h7drzjkmgqxrg5r6rz1zmlmwiv0fyp8q-crossover-19.0.0/crossover/bin/.cxdiag-wrapped: Accessing a corrupted shared library
.crossover-wrapped:warning: cxdiag failed (126)
.crossover-wrapped:error: The file /tmp/cxfixeswkv3i2doqhkp_5ts.xml is signed, but the signature is invalid.
.crossover-wrapped:warning: The newly downloaded /home/michaelk/.cxoffice/cxfixes.xml file is not properly signed. Discarding.
.crossover-wrapped:warning: an unexpected error occurred while parsing '/home/michaelk/.cxoffice/cxfixes.xml'. Ignoring this file
.crossover-wrapped:error: Could not identify the distribution
Traceback (most recent call last):
  File "/nix/store/h7drzjkmgqxrg5r6rz1zmlmwiv0fyp8q-crossover-19.0.0/crossover/lib/python/checkgtk.py", line 46, in status
    gi.require_version(lib, version)
  File "/nix/store/q0dwz62vhpyrssvfdlcid889d6kdgvgw-python3.7-pygobject-3.32.1/lib/python3.7/site-packages/gi/__init__.py", line 129, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace Gtk not available
Could not install some Unix packages
Some errors may prevent CrossOver Linux from working correctly:
* Could not load the GObject-Introspection Python module.
* Could not load the GObject-Introspection data for GTK.
* Cxdiag failed

You may be able to fix some issues by running one of the following commands as root:
Arch Linux             	pacman -Syu gtk3 python-gobject
Debian 7               	apt-get install gir1.2-gdkpixbuf-2.0 gir1.2-glib-2.0 gir1.2-gtk-3.0 gir1.2-pango-1.0 python3-gi python3-gi-cairo
Debian <= 6            	apt-get install gir1.2-gdkpixbuf-2.0 gir1.2-glib-2.0 gir1.2-gtk-3.0 gir1.2-pango-1.0 python3-gi python3-gi-cairo
Fedora <= 13           	yum install gobject-introspection gtk3 python3-gobject
openSUSE <= 11.2       	zypper install gtk3 python3-gobject

There is no automated fix for the remaining issues but you may find help on these pages:
https://www.codeweavers.com/support/wiki/Diag/brokencxdiag