Hi Filout,
I’m sorry to hear about the issues you’re experiencing. Here are some responses to your questions:
1. Yes, it seems like this is related to your server or provider configuration. The error messages indicate that there might be some restrictions or misconfigurations on the server side.
2. The config.json file is not a standard part of the WordPress installation or the All-in-One WP Migration plugin. It’s possible that this file is specific to your server environment or another plugin.
3. For the specific issue related to proxy_fcgi:error, adding a FilesMatch directive in your .htaccess file could help. However, the exact directive should be provided by your hosting provider since it depends on their server configuration.
I recommend contacting your hosting provider with these questions, as they can provide the precise configuration needed for their environment. They will be able to guide you on what exactly needs to be set in the .htaccess file to resolve the issue.