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The studio tweeted overnight to acknowledge the problem, which it said may be related to anti-virus software.
“We’re investigating an issue preventing players from launching #Warzone via the Battle.net client,” it said. “In some cases, we’re noticing conflicts with anti-virus software.
“We’ll share more info on this when possible.”
Responding to Raven’s message, Twitter user G3n3t3ch claimed to have been experiencing the issue for eight days.
Toys for Bob announced on Thursday that it is now supporting Warzone development, amid claims of layoffs at the Activision-owned studio.
The Novato, California-based developer, which made 2018’s Spyro Reignited Trilogy and 2020’s Crash Bandicoot 4: It’s About Time, said it’s “proud to support development for Season 3 of Call of Duty #Warzone, and look forward to more to come”.
Responding to the news, a former contract character designer at Toys for Bob claimed everyone they worked alongside at the studio was recently “let go”.
Warzone Season 3 guides:
Activision claimed earlier this month that Warzone has attracted over 100 million players since launching in March 2020.
VGC recently spoke to Raven creative director Amos Hodge and Treyarch creative specialist Miles Leslie in a Warzone interview published to coincide with the launch of Season 3.