Avia layout archirect is gone – not able to edit

Hey everyone,
after a couple of weeks not having updated my website, I checked in today and updated the wordpress verion 5.8. After that I tried to edit my site, but there is a huge problem:
– I clicked on “Edit” and then the site opened with a totally different look. I had to scroll down to get to the Avia layout archirect because there were a lot of blocks in HTML, for example:
[av_section min_height=’100′ min_height_px=’500px’ padding=’default’ shadow=’no-shadow’ bottom_border=’no-border-styling’ bottom_border_diagonal_color=’#333333′ bottom_border_diagonal_direction=” bottom_border_style=” scroll_down=’aviaTBscroll_down’ id=’home’ color=’main_color’ custom_bg=’#000000′ src=’http://www.pikarot.com/wp-content/uploads/2017/09/Pikarot_Silhouetten-1030×687.jpg’ attachment=’401′

….and so on

– Then I scrolled down and tried to edit the Avia layout archirect, but the textblock didn’t show any text when I opened a textblock and on the right side/preview side there was some notification saying something with “error” and “using html”.

– I logged out an back in but nothing changed except that the Avia layout archirect was now gone completely

Has this something to do with the wordpress update or is this an enfold issue? I tried to look for an solution, watched tutorials for the new wordpress, but I cannot find a way to get to a an editorlayout where I can edit my site.

It would be great if someone had an idea.
Thanks,
Alexia