Problems with first layer


I am using a Mod-T. Previously i have printed from astroprint cloud slicer just fine; however, today i have been unable to print a new slice. What is happening is the printer is calibrating then does it primer lines to ready the nozzle, slightly lifts the head, moves to the start location, but doesn’t lower the head to the bed and starts printing in the air. I have tried printing previous slices i’ve saved and it prints those fine. So I retry slicing the new piece with the exact same setting and it doesn’t help. I’m at my wits end.
Any suggestions? I’m relatively new and uninformed, so unable to use technical stats and jargin.


How do you generate the print file?