SITE HEADER CRASH

Hi. I have been using the kadence from a long time its light weight and easy to customize. However, recently i am facing the issues of header crash on my two sites i.e https://testdepurete.info and https://instamods.io. When i login and try to customize or even directly browse the design of the header collapse. and comes vertically but i am using it horizontally and even design it aside logo in row header columns. Can you please direct me to the documentation from where i can trouble shoot the errors?
Thanks and regards

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