Problem updating from 2.0.3 to newests

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I am working in a new website, all built with spectra, at first there was some problems changing to responsive options for choosing different paddings or another options available, but now update to 2.0.4 or 2.0.5, it literally destroy all my backend, just showing in every block “this block has encountered an error and cannot be previewed”

I have rollbacked to 2.0.3 but still I have many bugs and problems with this version, cannot change the responsive size, or paddings, even preview the mobile version does not work.

There are many more issues that I’m coming across during the development.
I have more than 10 years experience in WordPress web development as I am a FrontEnd developer

The page I need help with: [log in to see the link]

 

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