I had started encountering crashes on startup in multiple apps that all had networking issues at the core:
- RStudio Desktop failed to start, giving error messages
[rsession-ka37] ERROR system error 49 (Can't assign requested address); OCCURRED AT rstudio::core::Error rstudio::core::http::initTcpIpAcceptor(SocketAcceptorService<boost::asio::ip::tcp> &, const std::string &, const std::string &) src/cpp/session/http/SessionPosixHttpConnectionListener.cpp:103; LOGGED FROM: int main(int, char *const *) src/cpp/session/SessionMain.cpp:2088
- Adobe Premiere crashed on startup during "Initializing Application", before even opening a project.
- Audacity failed to start with "The Audacity IPC server failed to initialize. This is likely due to a resource shortage and a reboot may be required.".
The last one was my most helpful clue: something was up with my computer's networking settings. It may have been because I had followed these instructions and created a fake network adapter to use for connection sharing. I had deleted that adapter and no evidence remained of it, but I still suspected something wrong with networking. (As it turns out, probably deleting the interface was the cause of my problems.)
OS is Big Sur (macOS 11.6.2).