Searching for members in cards doesn't work

[clicit]

When opening a card and trying to add members, I want to use the search field. But when entering text nothing happens, except the following error message in the browser console:

Context

• Hardware: VPS bought online
• YunoHost version: 11.0.10.2 (stable)
• I have access to my server: *Through SSH | through the webadmin *
• Wekan version: 6.69~ynh1

Steps to reproduce

• Open a card
• Click the "+" icon to add members
• Type something valid into the search field

Expected behavior

When text is entered into the search field, the members list must be filtered accordingly.