Thanks for the report (and the translation Gareth). Apologies I was away over the weekend, so not able to respond earlier.
Just as a note: Flexibase is not being officially supported in Moodle3.2 (per the screenshot)- however, I have checked and the same issue exists for me in 3.1 as well, so I will be investigating and trying to fix. Not really sure what the issue is at the moment - I don't have anything that I'm aware of that alters this admin screen, and yet it doesn't appear to be a css issue, but one where the actual form that displays that button is not being created in the html.
Will investigate and provide a fix as soon as I can resolve it.