Some users report that they can't run Thonny. It's seem like one of the dependency, python-typed-ast, is not up to date.
The user's report: https://discuss.getsol.us/d/1321-thonny-python-ide-install-problems/2
Link to new python-typed-ast's tarball: https://files.pythonhosted.org/packages/34/de/d0cfe2ea7ddfd8b2b8374ed2e04eeb08b6ee6e1e84081d151341bba596e5/typed_ast-1.4.0.tar.gz