I can't make my own blueprint. I'm trying to make a blueprint with beacons, but I'm following the tutorial and only able to make one belt line. If I allocate more space for building drills, it says "unable to create a layout. could not place any mining drills."

Could you attach a screenshot of the blueprint and/or paste the blueprint string?

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

Oh I see the error. It can't cope with the fact that there's a gap between mining drills to fit the beacon and it's impossible to cover all of the resources. Will try to release an update shortly.

Released update with the fix.