Hi Jens,
We have replied to your ticket with a detailed explanation of why the issue happened and provide a solution for you. Please check your email inbox.
Sorry if we’re not fast enough to give you the solution. You reported that you have error after updating to the latest Suki and Suki Pro version.
We have tried the update directly on your website and it looks fine from our end. Turns out the issue came from when using Custom Blocks module, not the Update process itself.
So “Update crashes WordPress” as you stated in this review is NOT true.