Czarek Tomczak

pycrypto version is not specified and I don't recall now what version it should be. Have you tried installing latest pyinstaller? There was a patch merged recently that fixed issue...

Yes, but there are no other examples. There is also py2exe. An example is on SO, but it would need updating: https://stackoverflow.com/questions/15668568/how-to-compile-cefpython-to-exe

Scroll down on StackOverflow to see other answers with the code.

This error happened to me as well when running wxpython.py example.

Fixing the error is not enough, because if browser is NULL then we can't call user callback, as it is assigned to that browser. It must be fixed so that...

The GetCookieManager API was removed from upstream CEF. You can no longer create an instance on CefCookieManager, instead you have to create a new instance of CefRequestContext and provide a...

Since it works in official tkinter example and doesn't seem related to CEF since window management is handled by tkinter, I can't see what is the CEF Python issue here.

What tkinter and CEF versions? Anything interesting in logs?

Other problems related to "PyEval_RestoreThread" error message: https://github.com/cztomczak/cefpython/issues?q=is%3Aissue+is%3Aopen+PyEval_RestoreThread

CEF somehow affects tkinter app state. These issues become more severe if you initialize CEF before you initialize tkinter (see comments in example). One idea to try is to enable...