if the finish parts cannot stick on the platform or partially stick on the platform, please check the following issues.
1) Do horizontal calibration, make sure there is no gap between platform and tank bottom
2)Make sure the glass underneath the Resin Tank is clean

3)Avoid placing the object near cloudy parts of the tank

Here is the compare between the cloudy resin tank and normal one
Cloudy tank

Normal tank

4)Print sample stl, if you can print, means calibration success; if not, do calibration again
5)Always generate support properly before you print
6)If you can print calibration sample stl, but can't make your own stl stick to platform.
You need resize you stl, make it smaller. Large and solid sample will very easy to fail on a SLA printer. Put sample to the left of printer(near tilting axis) will make it easier to print