from old theme to laytheme - then content not showing anymore

[j36g2]

Hi there,
I habe a wp-website (last theme was "sydney") and i make now a staging website trying out laytheme. but the content is not showing (pages and posts) anymore. (menu and design works, but not the content)
i cleaned the cache (wp and browser) and firewall is also not the problem. also plugins are not the problems (i deactivated all except updraft and wp staging)
all is updated.
what's going wrong? is laytheme only for set up a new website? i thought laytheme is compatible with content (posts, pages) from old wp-websites.

THANK YOU

[arminunruh]

hey lay theme is not compatible with old content from an old website :/