My Saeco Sirius has been faithfully cleaned, had a few pro servicing sessions & lubrication. It still produces...

The open close repeatedly technique has worked in the past. Seems to trick the default response in the software on the PC Board. However, the pump is likely weak and failing or clogged is the likely situation. The pump can work temporary until it fails again. So expect draining problems again. Just document how often it occurs to let you know when the pump will likely fail big time.