Dear all,

I am restoring my mediawiki website on a new server. It happened this error:
[4027854c] /dir/index.php/Welcome_to_MyWebsite MWException from line 1287 of /var/www/xxx/dir/includes/parser/Preprocessor_DOM.php: PPFrame_DOM::expand: Invalid parameter type

Do you have any ideas? What does it indicate?
I look forward to any help. Thank you all!

Best,
Catherine