How to Fix BLZBNTAGT00000870 on Battle.net

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Are you getting a BLZBNTAGT00000870 error on Battle.net?

Here’s the first part of the error message, “We need your permission to continue”.

Followed by, “Try again and when the Blizzard desktop app or Agent asks for permission, please grant it”.

In this guide, you’ll learn why you’re getting a BLZBNTAGT00000870 error code on Battle.net and how to fix it.

Why am I getting a BLZBNTAGT00000870 error on Battle.net?

You’re getting a BLZBNTAGT00000870 error on Battle.net because your operating system’s permission settings blocked it.

Otherwise, Battle.net or the game that you’re trying to launch is blocked by your antivirus software.

To proceed, you need to allow the Blizzard Battle.net desktop app to make changes to your system.

In some cases, the error might appear because of a bug/glitch with the Battlen.net desktop app.

If that’s the case, you need to contact Blizzard support for help.

To fix BLZBNTAGT00000870 on Battle.net, you need to click “Allow” or enter your administrator password in the notification box and click “OK”.

You can also try deleting your temporary files or allowing Battle.net and the game that you’re trying to launch in your antivirus software.

Here are 3 methods to fix the issue:

Press “Win + R” > type “%temp%” > delete all of the files > restart Battle.net.
Allow Battle.net and the game that you’re trying to launch in Windows settings > Privacy & Security > Windows Security > Virus & threat protection > Manage ransomware protection.
Allow Battle.net and the game that you’re trying to launch in Control Panel > System and Security > Windows Defender Firewall > Allow an app or feature through Windows Defender Firewall.

After each fix, restart the Battle.net desktop app and try to launch the game.

Make sure to provide a detailed description of the issue that you’re facing and include the error code.