Plugin breaks blocks that use ServerSideRender

Hi!

I’ve come accross an issue with your plugin in that it breaks any block that uses the ServerSideRender component.

Steps to reproduce:

1. In a brand new WordPress install use npx @wordpress/create-block to create a new Dynamic block.
2. In the edit.js file load up a ServerSideRender component.
3. Ensure that component uses the attributes param.
4. The block will no longer render and is ‘broken’.

Error message provided:

{“code”:”rest_invalid_param”,”message”:”Invalid parameter(s): attributes”,”data”:{“status”:400,”params”:{“attributes”:”tpgbDisrule is not a valid property of Object.”},”details”:{“attributes”:{“code”:”rest_additional_properties_forbidden”,”message”:”tpgbDisrule is not a valid property of Object.”,”data”:null}}}}

I have provided a link to the example block file as part of this request. Note that this issue relates to https://github.com/WordPress/gutenberg/issues/16850 in that ServerSideRender does not accept attributes that are registered to blocks via JS, it needs to be via a PHP route.

As it currently stands, your plugin cannot be used on any site that has blocks relying on ServerSideRender.

Thanks in advance for your feedback on this!

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