page builder doesn't work? Lost my page... and revisie doesn't work

I have the Vega template for over 5 months and no issues jet… until yesterday. After changing my tekst (on my homepage), saving it, the whole page disappeared from de site en isn’t showing anymore. No worries, I will just put the revisie back, but still noting. In all the different pieces where you build the site (picture, tekst etc) is something wrong… all ? on every block… No revisie will work. Seems like the template has an issue?

WP and all my plugins are up to date… does anybody now what went wrong?

Please help,

Thank you in advance!

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