Server error 500 – elementor

hello, I run an online shop woocommerce with elementor plugin, after recent update to new WordPress version I started having problems which haven’t occurred before. link: WithSweetCompany.co.uk when I try to enter my website it usually shows now blank white screen until I refresh it again, then everything most of the time seems to load normally. Apart of that since update I cannot edit anything by elementor, when I change something and press publish I’m getting server error 500, sometimes I don’t even see a button “edit with elementor” on admin top bar, after refreshing many times sometimes button appears but still gives server error 500. I noticed that after enabling Unlimited Elements for Elementor or Ultimate Addons for Elementor (UAE) i cannot use elementor to edit page as it shows error 500, after deactivating both of that plugins, everything works back again. I do not own backup of previous version of WordPress unfortunately. I appreciate help and maybe suggestion how to get more details about problem. thanks radek The page I need help with: [ log in to see the link]