The error message ERR_EMPTY_RESPONSE can happen with some servers.
To fix this, please switch the Editor Loader Method as shown below:
* Switch Editor Loader Method is useful in solving the “err_content_decoding_failed” and err_empty_response” issues that sometimes occur. Enabling this option helps users running sites on servers with low resources which have difficulty reading long JSON code. When enabled, the tool splits the lines so that these servers can read the JSON code without issues. Switching to this method won’t negatively affect performance. Instead, it will likely improve performance.