Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/jellyfin/blame/commit/85a58fd655240fd0ddd10bdaaad4a9bb8cd7051d/MediaBrowser.Api/Movies/CollectionService.cs
You should set ROOT_URL correctly, otherwise the web may not work correctly.
[ApiMember(Name = "IsLocked", Description = "Whether or not to lock the new collection.", IsRequired = false, DataType = "bool", ParameterType = "query", Verb = "POST")]
publicboolIsLocked{get;set;}
[ApiMember(Name = "Name", Description = "The name of the new collection.", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "POST")]
publicstringName{get;set;}
[ApiMember(Name = "ParentId", Description = "Optional - create the collection within a specific folder", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "POST")]