If you want to test ESP32-S2 and/or ESP32-C3 through the board manager, please use the development release link:
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json
Now you can install the latest 2.0.0 version from the boards manager.
Latest Stable Release 
Latest Development Release 
You can use Arduino-ESP32 Online Documentation to get all information about this project.
- Getting Started
- Installing (Windows, Linux and macOS)
- Libraries
- ESP-IDF as Component
- FAQ
- Troubleshooting
You can use EspExceptionDecoder to get meaningful call trace.
Before reporting an issue, make sure you've searched for similar one that was already created. Also make sure to go through all the issues labelled as for reference.
Finally, if you are sure no one else had the issue, follow the issue template while reporting any issue.
We welcome contributions to the Arduino ESP32 project!
See contributing in the documentation for more information on how to contribute to the project.