try:
– switching to the default theme by renaming your current theme’s folder in wp-content/themes using FTP or whatever file management application your host provides.
– resetting the plugins folder by using FTP or whatever file management application your host provides. Sometimes, an apparently inactive plugin can still cause problems.
– re-uploading all files & folders – except the wp-content folder from a fresh download of WordPress. by using FTP or whatever file management application your host provides.
thanks.
Recently my host company tell me that they are migrating.
Does the problem from that?If yes,who can fix it?me or they.
Thanks
mb_convert_encoding is a php function (not WordPress):
http://php.net/manual/en/function.mb-convert-encoding.php
Does your host meet the minimum requirements to run WordPress:
http://wordpress.org/about/requirements/
Ask them if they have a problem on their end.