I tried to move a site to a new server and domain. Everything seemed to work fine, except the Customizer, which brings up a 500 Internal Server Error. The only way I could remove the error is by deactivating GP Premium. Deleting GP premium, reinstalling and reactivating did not help.
Your help with this would be greatly appreciated. If not how to fix the problem then advice on the best way to migrate, without the errors.
Having looked at the error_log on the destination server it look’s like it might be a memory issue:
[Sat Feb 14 18:04:21 2015] [error] [client 126.96.36.199] ModSecurity: Output filter: Response body too large (over limit of 524288, total not specified). [hostname “traintocampaign.london”] [uri “/wp-admin/customize.php”] [unique_id “VN@OIX8AAAEAA5ZGG4IAAAAX”]
I’ve passed the matter on to the host to deal with.