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How to Fix BLZBNTAGT00000870 on Battle.net

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.

How to fix BLZBNTAGT00000870 on Battle.net


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.

If all else fails, you can contact Blizzard support for help: https://us.battle.net/support/en/help.

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

Further reading

How to Add Your Phone Number to Blizzard (Battle.net)

How to Fix Error Code 0x00001338 in Modern Warfare 2

How to Fix “0xc0000005 (0) N” in Modern Warfare 2


About the author

Lim How Wei

Lim How Wei is the founder of followchain.org, with 8+ years of experience in Social Media Marketing and 4+ years of experience as an active investor in stocks and cryptocurrencies. He has researched, tested, and written thousands of articles ranging from social media platforms to messaging apps.

Lim has been quoted and referenced by major publications and media companies like WikiHow, Fast Company, HuffPost, Vice, New York Post, The Conversation, and many others. One of his articles about the gig economy was quoted by Joe Rogan who hosts The Joe Rogan Experience (arguably the most popular podcast in the world), in the This Past Weekend podcast by Theo Von.

In his free time, Lim plays multiple games like Genshin Impact, League of Legends, Counter-Strike, Hearthstone, RuneScape, and many others. He creates guides, walkthroughs, solutions, and more on games that he plays to help other players with their progression.