You may need a new dongle, you may need to update your drivers, you may need to update your mobo drivers and bios… Many things might be causing this. Could you test it with someone else’s dongle, or another computer? Have you tried simply moving the dongle to another USB port, or even cleaning the contacts?
Yes, you can buy a new dongle for not much money, I did this a while back because mine cracked and I didn’t trust it. It’s a simple matter to transfer the licences once they’re both plugged in. And if you have trouble transferring due to your old dongle being broken then the Steinberg support will assist but you would have to post them the old dongle I think.
P.S. I’m sure there’s more info on the Steinberg site…