We think you’ll agree when we say: A 503 service unavailable error is one of the most baffling errors you can ever encounter on your WordPress site. Main reason being the error doesn’t make it clear what’s wrong. The fact that it can be caused by a number of things makes matters worse. Moreover, depending on the server configuration this error can be displayed differently. For example, you can see these error codes instead: Turns out fixing a 503 service unavailable error is relatively easy and in this post we show you exactly how. Note: In this tutorial, we will show how to debug and fix the error for WordPress based websites. However, similar steps can be applied to any CMS. Causes of 503 Service Unavailable Error in WordPress A 503 service unavailable error can be caused by a number of things including (but not limited to): Buggy plugins or themes A misbehaving custom PHP script Insufficient server resources Server glitches Malicious attacks such as the infamous Distributed Denial of Service (DDoS) attack We will go over each of these causes and offer various solutions regarding how you can fix the 503 service unavailable error. Faulty plugins are responsible for
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