Java/JSP – Minecraft server giving random error out of the blue, IllegalStateException [closed]

I am running a minecraft server with mods, and ran into this error –

[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [iceberg] Starting version check at https://mc-update-check.anthonyhilyard.com/520110
[16:33:13] [Forge Version Check/WARN] [ne.mi.fm.VersionChecker/]: Failed to process update information
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
        at com.google.gson.Gson.fromJson(Gson.java:1226) ~[gson-2.10.jar%2372!/:?] {re:mixin}
        at com.google.gson.Gson.fromJson(Gson.java:1124) ~[gson-2.10.jar%2372!/:?] {re:mixin}
        at com.google.gson.Gson.fromJson(Gson.java:1034) ~[gson-2.10.jar%2372!/:?] {re:mixin}
        at com.google.gson.Gson.fromJson(Gson.java:969) ~[gson-2.10.jar%2372!/:?] {re:mixin}
        at net.minecraftforge.fml.VersionChecker$1.process(VersionChecker.java:183) ~[fmlcore-1.20.1-47.3.0.jar%23634!/:?] {}
        at java.lang.Iterable.forEach(Iterable.java:75) ~[?:?] {re:mixin}
        at net.minecraftforge.fml.VersionChecker$1.run(VersionChecker.java:114) ~[fmlcore-1.20.1-47.3.0.jar%23634!/:?] {}
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
        at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:393) ~[gson-2.10.jar%2372!/:?] {}
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:182) ~[gson-2.10.jar%2372!/:?] {}
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:144) ~[gson-2.10.jar%2372!/:?] {}
        at com.google.gson.Gson.fromJson(Gson.java:1214) ~[gson-2.10.jar%2372!/:?] {re:mixin}
        ... 6 more
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [supplementaries] Starting version check at https://raw.githubusercontent.com/MehVahdJukaar/Supplementaries/1.20/forge/update.json
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [supplementaries] Found status: BETA Current: 1.20-2.8.17 Target: null
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [create_pattern_schematics] Starting version check at https://raw.githubusercontent.com/cakeGit/Pattern-Schematics-Multiloader/1.20.1/forge-updates.json
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [create_pattern_schematics] Found status: AHEAD Current: 1.1.15+forge-1.20.1 Target: null
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [packetfixer] Starting version check at https://api.modrinth.com/updates/packet-fixer/forge_updates.json
[16:33:13] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [packetfixer] Found status: UP_TO_DATE Current: 1.4.2 Target: null

I am curious if anyone has any suggestions on what is causing this/how to fix it?

I have tried reinstalling the iceberg mod, as well as deleting it’s configs, as I think that’s the problem mod but i’m not entirely sure.