How to reproduce:
1. Open the user's attached "WebRequestTest.zip" project
2. Open Player settings (File > Project Settings... > Player)
3. In the "Other" section make sure "Scripting Backend" is set to "Mono"
4. Build And Run the "Main" Scene
5. In the app press the button on the right

Expected results: "Success" is printed in the app on the left
Actual results: "Object reference not set to an instance of an object" error is printed on the left

Reproducible with: 2020.3.39f1, 2021.3.8f1, 2022.2.0a10
Not reproducible with: 2022.2.0a11, 2022.2.0b6, 2023.1.0a8

Reproduced on:
VLNQA00335, Samsung Galaxy S20+ 5G (SM-G986B), Android 10, CPU: Exynos 990, GPU: Mali-G77
----------, Oppo Reno Z 中国版 (PCDM10), Android 11, CPU: NOT FOUND, GPU: PowerVR Rogue GM9446
VLNQA00286, Meizu Pro 5 (PRO 5), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
VLNQA00313, Huawei Y6 Ⅱ Compact (HUAWEI LYO-L01), Android 5.1, CPU: MediaTek MT6735, GPU: Mali-T720

Note:
- Not reproducible on Windows when using Mono
- The issue is not reproducible when IL2CPP is used for the Android build