https://pastebin.com/njyTYFK0

[09:42:31 ERROR]: Error occurred while enabling MobHunting v7.5.2 (Is it up to date?)
java.lang.StackOverflowError: null
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.ScalarNode.toString(ScalarNode.java:109) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.MappingNode.toString(MappingNode.java:106) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.MappingNode.toString(MappingNode.java:106) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.MappingNode.toString(MappingNode.java:106) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.MappingNode.toString(MappingNode.java:106) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]
at org.yaml.snakeyaml.nodes.MappingNode.toString(MappingNode.java:106) ~[patched_1.16.1.jar:git-Paper-128]
at java.lang.String.valueOf(String.java:2994) ~[?:1.8.0_262]
at java.lang.StringBuilder.append(StringBuilder.java:131) ~[?:1.8.0_262]

Tried with 7.5.2. 7.5.0, and 7.5.3 snapshot and get same results all on 1.16.1

This means that you have an error in one of the *.yml files. Use a yaml online tester to find the error.

@Rocologo All say valid. This issue happens even with default config values as I fully reinstalled the plugin.

Have you checked the yml files in the BagOfGold folder? If now, please try that.

Okay I checked the BagOfGold rewards.yml and it had a broken value...

Now it keeps saying: [21:01:24 INFO]: [BagOfGoldCore] The rewards.yml file contain broken rewards. They will be deleted.

But I have not seen it remove it

This means that the rewards.yml file in bagofgold folder contains Locations where the reward block is missing in your world, but they should be deleted automatically.

Alright, thank you. Was unaware BagOfGold yml files were for this. Should be all good to go thank you