I have a issue loading blocks on the page when I try to edit it. At the place of the block I find the following message: Error loading block: The response is not a valid JSON response. Also I have another problem, it is error 503.
For information I have two external plugins installed namely: LiteSpeed Cache and Super Progressive Web Apps.
Please disable third-party plugins and customizations (if there are any) and check if this issue persists. If you use a caching plugin, make sure that caching is disabled for logged-in users. If the error still exists, please check your PHP logs How to configure WordPress error logs to identify and resolve problems - HivePress Help Center
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