Steps:
1. Create a New project
2. Import user's attached unitypackage "iossafaricantaccess.unitypackage"
3. Project Settings > Player > Publishing Settings > Compression Format : Disabled
4. Build
5. Upload to app.netlify.com/ or another HTTPS server
6. Launch the website on iOS device

Expected: device camera view is shown on the screen.
Actual: an error is shown on the screen:
abort({}) at jsStackTrace@... (see attached screenshot "IMG_0066.PNG"

Reproduced with: 2018.4.28f1, 2019.4.14f1, 2020.1.12f1, 2020.2.0b11, 2021.1.0a4.

Reproduced on:
iPhone 7 Plus, iOS 12.0 with Safari, Google Chrome and Firefox browsers.

Not reproduced on:
VLNQA00334, Xiaomi Mi A3 (Mi A3), Android 10, CPU: Snapdragon 665 SM6125, GPU: Adreno (TM) 610 with Chrome
VLNQA00229, Oneplus OnePlus6T (ONEPLUS A6013), Android 9, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630 with Chrome

Script:

using UnityEngine;
using UnityEngine.UI;

public class test : MonoBehaviour {

private WebCamTexture cameraTexture;

void Awake() {
cameraTexture = new WebCamTexture(WebCamTexture.devices[0].name, Screen.width, Screen.height);
GetComponent<MeshRenderer>().material.mainTexture = cameraTexture;
cameraTexture.Play();
}

}