Pretty sure it worked the first time but not after that.
Server crash log https://mclo.gs/tSuUoi0
My client crash log is attached to this report
crash-2024-06-09_10.04.41-client.txt

The crash in the second log you sent is caused by SpruceUI, not owo-lib. In fact, according to the log, owo isn't even being loaded in that instance. Thus I'll conclude your initial problem was indeed just an incorrect owo version - feel free to reopen the issue if this turns out not to be the case

Cheerse

I realized that I had 1.20.3 owo but I changed it to 1.20.5 owo but it still crashed
crash-2024-06-09_10.04.41-client.txt