I am trying to make an export of the xibo v1.2.2 database but it fails exporting, any thoughts?

from phpmyadmin I press the export button. It doesn't matter if export to a file or not. In all cases the export fails. When I don't export to a file, the textarea which should contain the database is blank. When I export to a file after a whil the browser gives an error message:

File not found

Firefox can't find the file at https://ns1.theothernameserver.net:8443/domains/databases/phpMyAdmin/export.php.

Check the file name for capitalization or other typing errors.
Check to see if the file was moved, renamed or deleted.

While an other version of Xibo 1.4 does export properly.
Xibo itself appears to work properly.

My real problem is to move the xibo server to another server which gets the same domain name. So the domain is transferred and I would like to keep xibo just working.

Any help is appreciated.