I'm working a command machine (in 1.13) and it works... but the "dummy" objectives refuse to be created by command blocks. I've tried using them in the machine and placed by hand; nothing works. But the objective is added if I run them in chat afterwards. Any suggestions on how to fix this or what's happening?
/scoreboard objectives add testing dummy (run in command block)
For me ", monospace">'/scoreboard objective add testing dummy'works fine in a command block. Maybe you accidentally put a space after dummy. Like this: '", monospace">/scoreboard objective add testing dummy '. There should be an error in the command block you ran it in though, something like ", monospace">'...ting dummy <--[HERE]'. Then it would indeed not create the objective because it gave an error. Good luck, let me know if it helps