Hi and welcome,
Can you be more explicit?
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Screenshot says:
The permitted area has been exceeded. The available design space is 1km³
I saw that state once, forgot how I get there.
I would try to click twice on ZXY cube in the upper corner.
Make sure your units of measure are correct. If you’re using meters, you could easily exceed that 1 km^3 limitation.
It can be confirmed that the unit is millimeters
It seems to have no effect
I have updated the screenshot below the post
Can you share this project?
Due to confidentiality requirements, this file cannot be shared 
In that case I can’t help you.