/docs/src/main/paradox/troubleshooting/unsupported-http-method-pri.md

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  1. # Unsupported HTTP method: PRI
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  3. ```
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  4. Illegal request, responding with status '501 Not Implemented': Unsupported HTTP method: PRI
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  5. ```
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  7. This indicates that a HTTP/2 request was received, but the server was not
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  8. correctly set up to handle those. You may have to:
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  10. * Add the @ref[`akka-http2-support` dependency](../server-side/http2.md#dependency) to the classpath
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  11. * Make sure the @ref[`akka.http.server.preview.enable-http2` option](../server-side/http2.md#enable-http-2-support) is enabled
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  12. * Make sure you are running @ref[at least JDK version 8u252](../server-side/http2.md#dependency)
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  13. * Make sure you are not using @apidoc[Http().bindAndHandle()](Http$) or @apidoc[Http().newServerAt().bindFlow()](ServerBuilder), but @apidoc[Http().newServerAt().bind()](ServerBuilder).
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