When exactly does the error occur? Which extensions are you using?
It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select “Download Blocks as Image”. You might want to use an image editor to crop etc. if required. Then post it here in the community.
Taifun
Your topic will be delisted soon as your blocks clearly says It is not from kodular. Better ask in the concern platform. Different platforms have different structures