SOLVED!
Steps:
1. Stop vCenter service
2. Look for your ID in LS_ServiceID.prop in folder C:\ProgramData\VMware\VMware VirtualCenter
3. Copy this ID (e.g. {C4672589-9258-42B1-90E2-1EF268BBD402}:5 )
4. Edit your vpxd.cfg in the same folder and replace
<serviceId>vCenterService</serviceId>
with
<serviceId>your ID</serviceId>
5. Start vCenter Service
Then the SSL automation tool works!
You don't need to revert the changes.