Please upload the whole server log to pastebin and send the link here. Which sponge and holograms version do you use?
Update to new API 7 official pls 
1.12.2
The latest already works for api 7
If you can install. Only in the console gives me errors every certain time (I have No Internet, I hope that is why)
But if it works, thank you:)
I don’t think it works with the very very latest version. Will update it.
This is a known bug. For the time being please use a slightly older Sponge version(like 5-6 build back), or wait for a fix.
1 Like
I’ll be waiting, thanks
In our continuing effort to phase out the Plugin Releases category, this thread is being locked because the plugin is already listed on Ore.
Check it out: RandomByte / Holograms