Failed to compiling `ffmpeg.wasm-core`

**Describe the bug**

**My requirement:** compile `ffmpeg.wasm-core` with `--enable-openssl` for https protocol.

**Output I got**
> ERRO[0661] error waiting for container: invalid character 'u' looking for beginning of value

**To Reproduce**
Steps to reproduce the behavior:
1. Go to https://github.com/ffmpegwasm/ffmpeg.wasm-core#setup
2. Follow the given steps to compile it.
3. Will get below error.
> ERRO[0661] error waiting for container: invalid character 'u' looking for beginning of value

**Complete logs:** [here](https://docs.google.com/document/d/1BvO9tUhkzAT10QrUSqfjGBwQwlQFaBhNOAQWpQBpguQ/edit?usp=sharing)

**Expected behavior**
Should compile with no error. (warnings are fine you mentioned in steps 😉)

**Screenshots**

**Desktop (please complete the following information):**
- OS: MacOS BigSur (11.2.1)