Hi, @pauljvanleeuwen
It seems to be a compatibility issue with Polylang widgets with 5.8.
Several people already asked about this at https://ww.wp.xz.cn/support/plugin/polylang/
The plugin’s developers and support community from the above mentioned forum can tell you more about this.
Kind regards!`
I installed the Classic Widgets plug-in, which solved the issue. It blocks the block editor from managing widgets.
I’m glad it worked with Classic Widgets. Thanks for sharing your solution. Let’s hope Polylang updates their plugin soon, so Polylang users can use the power of Block Widgets too.
🙂