Hi @Polynique,
Still it asks for some other authentication.
But that is only occur to some user, it is just because that exception is already declared somewhere before this plugin. So only PHP gives you this error. I still have the same plugin in my local installation, and it didn’t give any error.
Did you try disable all plugins before activation of this plugin?
If that pulls tweets or not in the frontend?
Let me know, what you got.
Thanks,
laranz.