Photofocus PRO Theme compatibility issues with PHP 7.4

The Site Health in WP dashboard was recommending that I upgrade to PHP 7.4 from PHP 7.3.27...I asked my ISP provider to apply the change...after the change was applied, my home page changed to a Portrait Page layout (ie. like a document) with white background...at the bottom of the page, it was telling me that the website has experienced a critical error...I asked my ISP to revert to PHP 7.3.27 and the problem has resolved itself.