Server not starting help!

hi, my server suddenly stopped working. i am hosting the server locally and i do not have alot of knowledge regarding servers… however here are the lines of code i have.

Loading libraries, please wait…
[17:39:03 FATAL]: Failed to start the minecraft server
java.lang.Exception: Failed to load configuration file: bukkit.yml
at net.minecraft.server.v1_16_R3.Main.loadConfigFile(Main.java:272) ~[patched_1.16.5.jar:git-Paper-684]
at net.minecraft.server.v1_16_R3.Main.main(Main.java:108) ~[patched_1.16.5.jar:git-Paper-684]
at org.bukkit.craftbukkit.Main.main(Main.java:283) ~[patched_1.16.5.jar:git-Paper-684]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_291]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_291]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_291]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_291]
at io.papermc.paperclip.Paperclip.main(Paperclip.java:58) ~[server.jar:?]
Caused by: org.bukkit.configuration.InvalidConfigurationException: expected ‘’, but found ‘’
in ‘string’, line 15, column 1:
settings:
^

    at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:59) ~[patched_1.16.5.jar:git-Paper-684]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:160) ~[patched_1.16.5.jar:git-Paper-684]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:128) ~[patched_1.16.5.jar:git-Paper-684]
    at net.minecraft.server.v1_16_R3.Main.loadConfigFile(Main.java:270) ~[patched_1.16.5.jar:git-Paper-684]
    ... 7 more

Caused by: org.yaml.snakeyaml.parser.ParserException: expected ‘’, but found ‘’
in ‘string’, line 15, column 1:
settings:
^

    at org.yaml.snakeyaml.parser.ParserImpl$ParseDocumentStart.produce(ParserImpl.java:225) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:122) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:150) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:490) ~[patched_1.16.5.jar:git-Paper-684]
    at org.yaml.snakeyaml.Yaml.load(Yaml.java:416) ~[patched_1.16.5.jar:git-Paper-684]
    at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:57) ~[patched_1.16.5.jar:git-Paper-684]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:160) ~[patched_1.16.5.jar:git-Paper-684]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:128) ~[patched_1.16.5.jar:git-Paper-684]
    at net.minecraft.server.v1_16_R3.Main.loadConfigFile(Main.java:270) ~[patched_1.16.5.jar:git-Paper-684]
    ... 7 more

There is a syntax error in your bukkit.yml file. You can pass it through a cool website like this one to attempt to find where. I also feel like some important info got lost when you copy and pasted the error over, but you can also simply delete bukkit.yml and have the server automatically generate a new one with the default values.