LaCie SSD password wont open
Since a software update to Monterey 12.4 I cannot open my LaCie SSD. It has become read-only. On entering the password, I get the message:"Empty password'. I cannot find any reference to this in support material.
The SSD drive icon is showing on the desktop. It just will not open. I also have another external drive permanently plugged in: a Lacie External Portable Mobile Drive. This is working fine. I have re-installed the Seagate Toolkit Software. It made no difference. It reinstalls the driver and then requires a restart. The SSD mounts on the desktop. But it is locked. I am certain I am entering the correct password. . I have only had the SSD for a few months. It has always opened prior to the Monterey update. (My computer is an iMac 27"Retina 5K.) I would be grateful for any help with this.
iMac, OS X 10.11