So, trying to paste the tally.so form embedd into blocs and getting empty screen. Tried everything: pasting into head, foot, body, anywhere. It seems that it just not load 
Any advice?
please provide a link to the page that does not work.
the form certainly needs a lot of css and possibly also js that has to be loaded. i don’t think a simple copy paste will be enough.
so please provide a link, with the browser’s developer tools you can then see more…