Spinning Circle when trying to share items in ecloud

Hi everyone,
I really love the eCloud nextcloud instance and would like to integrate it a bit more in my work routine. However, if I want to share an item (file, deck, does not matter what) the contact search bar show a spinning circle and I never get a hit on a search.
As I have at least one document that I am co-editting with a colleague, I know that it has worked in the past.
Does anyone know what it going on and how to solve it?

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Same here :
(the circle at right of input field in spinning, hard to render with a screenshot :wink: ).

Related to https://gitlab.e.foundation/e/backlog/-/issues/2014 ?