Paper and Spigot plugin.yml errors
"depend is of wrong type" (also softdepend, loadbefore, authors)
Server log
org.bukkit.plugin.InvalidDescriptionException: depend is of wrong type
What it means
The server expects a list here but found a single piece of text, so it refuses the plugin. The same message appears for softdepend, loadbefore and libraries, and as "authors are of wrong type" or "contributors are of wrong type".
What causes it
The value is written as plain text instead of a list.
How to fix it
Before
depend: Vault authors: Alice
After
depend: [Vault] authors: [Alice]
A list can also be written one entry per line, each starting with - . For a single author you can use author: Alice (singular) instead.
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