WordPress Upgrade Error – Incompatible Archive Solution

Just a quick post to highlight the solution to a recent WordPress issue I had when trying to upgrade WordPress release using the “Upgrade Automatically” option. The error I was seeing was:

Incompatible Archive.: PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature

Even for someone who may be technically minded this is a little unhelpful… but thankfully the solution (in my case at least) was to free up some space on my hosting account. So it seems that the cause of the issue (or at least one of the causes) is that there was not enough space available for the automatic WordPress upgrade to take place.

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