The error might display three different types of messages ie.

crossdomain access denied, No levels to play and 404 not found.

Get solutions from this post given byMiniToolto fix the issue.

Error 404 Not Found, How To Fix It Properly

Here are three of the most common causes for the Cannot load M3U8: crossdomain access denied error.

Firewall: The crossdomain access denied oops message is resulting from the blocked proxy or firewall.

The 404 not found error will prevent you from accessing the content you want.

click the Allow an app through firewall option

Its important to figure out what happens & how to fix it.

Then, here are some methods that it’s possible for you to attempt to fix this issue.

The steps are as follows:

Step 1:TypeFirewallin theSearchbox to openFirewall & online grid protection.

click Site Settings

Then click theAllow an app through firewalloption.

Step 2:check that the box that allows your internet tool is checked in bothPublicandPrivatenetworks.

If not, move on to the next solution.

Five Useful Solutions to Fix Microsoft Edge Critical Error

it’s possible for you to allow cookies and third-party data in your web client.

Here I take Google Chrome and Microsoft Edge as examples.

Step 2:Scroll down and click theAdvancedoption.

Now clickSite Settingsunder thePrivacy and securitysetion.

Step 3:SelectCookies and site data.

verify that theBlock third-party cookiesoption is unselected.

Step 2:Then selectPrivacy & security configs.

Step 3:Now verify that under theCookiessection, theDont block cookiesoption should be selected.

When you install an adware program on your system, the notification often says Critical Error.

Here are how to fix Microsoft Edge critical error.

The End

Have you met the Cannot load M3U8 error alert in your web app?

I believe that one of them can be helpful to you.