It worked, except now it doesn't. Here's the error:
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## Generated Bug Report
<!--- DO NOT OPEN A ISSUE IF THIS IS A PLUGIN ERROR -->
PLUGIN ERROR: TRUE
### Expected Behavior
<!--- What would you expect to happen -->
### Actual Behavior
<!--- What actually happened -->
### Steps to Reproduce
<!--- Reliable steps which someone can use to reproduce the issue. Please do not create issues for non reproducible bug! -->
### OS and Versions
* Nukkit Version: git-02cd198 
* Java Version: OpenJDK Server VM (11.0.9.1+1-post-Raspbian-1deb10u2)
* Host Configuration: 
| Item | Value |
|:----:|:-----:|
| Host OS | Linux-arm [5.4.79-v7l+] |  
| Memory(RAM) | 0 B | 
| Storage Size | 31.1 GB | 
| Storage Type | Disk 0:(avail=27.1 GB, total=31.1 GB)  | 
| CPU Type | UNKNOWN | 
| CPU Core Count | 4 | 
### Crashdump, Backtrace or Other Files
```
java.lang.IncompatibleClassChangeError: Method 'com.creeperface.nukkit.placeholderapi.api.PlaceholderAPI com.creeperface.nukkit.placeholderapi.api.PlaceholderAPI.getInstance()' must be Methodref constant
	at me.petterim1.scoreboards.Main.getScoreboardString(Main.java:77)
	at me.petterim1.scoreboards.ScoreboardUpdater.lambda$run$0(ScoreboardUpdater.java:37)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at me.petterim1.scoreboards.ScoreboardUpdater.run(ScoreboardUpdater.java:37)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
```