Type of bug

Error in console

/ess dump all output

https://paste.gg/p/anonymous/d31dd5f7da85486db0939a2fe0fd8b07

Error log (if applicable)

https://paste.gg/p/anonymous/d31dd5f7da85486db0939a2fe0fd8b07

Bug description

When updating server from 1.8.8 to 1.12.2, essentials spams that error in console during startup until the server is killed. Have already tried

Steps to reproduce

• Be converting essentials files to new version
• Do it poorly i guess

Expected behaviour

Server should start

Actual behaviour

Server doesn't start

can you send over a few files in plugins/Essentials/userdata. Censor them for ip addresses and related information before sending.

Here's a couple. The "mail: []" type at the end was generated by essentials when converting from the legacy playerdata files, which don't have that variable.
playerdata-samples.zip

For tracking, this appears to be an issue with Configurate: SpongePowered/Configurate#411

Waiting for a fix from them before I can do anything