The error log is saved in "error_log" directly under the document root, so please refer to it.
In the case of relocation, some files may be lost during the relocation, so we recommend using a plug-in method.
In addition, mixhost provides a simple moving function that does not use plugins.
Please see here for how to use it.
Please refer to the help center below for information on how to transfer using a plug-in.
How to move WordPress server (using All-in-One WP Migration)
How to transfer WordPress from another server (using Duplicator)