Various users have voiced their concern that they are getting the Client version mismatch error message while trying to launch Heroes of the Storm. So why is this happening? Well, some of the game servers are buggy and are not being updated in real-time. For example, there are around 7 different US servers for Blizzard, out of which three are currently not working along the expected lines. Since the game randomly allocates a server, so every time you would get that buggy server, you will be greeted with the Client version mismatch error.
So how to resolve this issue? Well, you would have to block those 3 buggy IP addresses. Doing so will leave your PC with no choice but to connect to one of the remaining (and working) addresses. Fortunately, we have already got hold of those issue-causing IP addresses for the US region, so let’s put them on the blacklist right away. This should then fix the Client version mismatch error in Heroes of the Storm.
How to Fix: Heroes of the Storm Client version mismatch error
So these were the steps to fix the Client version mismatch error in Heroes of the Storm. As far as the official stance on this matter is concerned, the developers are yet to acknowledge this issue, let alone give out any ETA for the rollout of a fix. As and when any of these two things happen, we will update this guide accordingly. In the meantime, the aforementioned workarounds are your best bet.
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