JW PLAYER FLASH VIDEO LOADING ERROR "CANNOT LOAD M3U8: CROSSDOMAIN ACCESS DENIED (2048)" ON FIREFOX ONLY · ISSUE #1557 · JWPLAYER/JWPLAYER · GITHUB

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The “Cannot load M3U8″ error occurs when you try to play a video on the internet. The error might display three different types of messages ie. “crossdomain access denied”, “No levels to play” và “404 not found”. Get solutions from this post given by MiniTool lớn fix the issue.

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Cannot Load M3U8

The “Cannot load M3U8” error prevents you from playing the video, & the error is not limited khổng lồ a specific browser, and almost all browsers have reported the error lượt thích Google Chrome và Microsoft Edge.

In this post, I will provide you with a detailed guide lớn follow those methods and also inform you about the reasons which trigger the problem. Here are three of the most common causes for the “Cannot load M3U8: crossdomain access denied” error.

Firewall: The “crossdomain access denied” error message is caused by the blocked proxy or firewall. Some videos may be blocked in your country, or for some reason, the firewall may consider it dangerous, so it may fail to lớn load with this error.

Cookies: You see this”No levels khổng lồ play” error when you deny access to lớn third-party data & cookies in your privacy settings.

Removal: If the platform or uploader deletes the video clip you want to watch, the message “404 not found” will appear.


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The 404 not found error will prevent you from accessing the nội dung you want. It’s important to lớn figure out what happens và how khổng lồ fix it.

Xem thêm: Cách Tắt Secure Search Trên Google Chrome, Triệt Để Nhất, Cách Gỡ, Xóa Bỏ Search

Then, here are some methods that you can try to fix this issue.

Method 1: Grant Access to lớn the Firewall

The first method you can try lớn fix the Cannot load M3U8 error is granting access lớn the firewall. The steps are as follows:

Step 1: Type Firewall in the Search box to open Firewall và network protection. Then click the Allow an tiện ích through firewall option.


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Step 2: Make sure the box that allows your browser is checked in both Public and Private networks.

Then restart your browser and kiểm tra if the “Cannot load M3U8 crossdomain access denied” error has been fixed. If not, move on lớn the next solution.

Method 2: Allow Cookies

Sometimes, the use of third-party data & cookies is not allowed because of your privacy settings that will cause the “M3U8 crossdomain access denied” error. You can allow cookies & third-party data in your browser. Here I take Google Chrome and Microsoft Edge as examples.

For Google Chrome

Step 1: open Google Chrome, click the three dots in the đứng đầu right-hand corner & click Settings.

Step 2: Scroll down và click the Advanced option. Now click Site Settings under the Privacy and security setion.