This specific error below Error 001887 is related to datastore dependency on SSLv3 protocol. If it is disabled on user machine then you see this problem. This is fixed in 10.6.1 what version are you currently using?
If you are using Version 10.6, you can fix it with following steps:
- Open a command window as admin (make sure to open window as admin using Run As)
- Go to C:\Program Files\ArcGIS\DataStore\tools folder
- Run the following at the command prompt:
changedbproperties --store tileCache --enablessl none
- Restart server/datastore