it seems the theme is missing a file. maybe your lay theme is corrupted, meaning somehow its missing a file mh
can you go to laykeymanager.com download the latest version then go to appearance → themes
and then upload the downloaded lay theme, replacing the old one?
or: 2. Disable all Plugins
maybe theres an issue with a plugin
if it doesnt work
can you send your website address, /wp-admin/ username and password and a link to this topic to info@laytheme.com?