The latest version is installed, the old tebex donate plugin has been removed, I tried debugging but these errors have continued for 3 days.

(02:20:35) | ExType: JsonSerializationException

(02:20:35) | Web request callback raised an exception (InvalidCastException: Null object cannot be converted to a value type.)

at System.Convert.ChangeType (System.Object value, System.Type conversionType, System.IFormatProvider provider) [0x00019] in <4889cca7f3644a7fa341501beb4caacb>:0

at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType (Newtonsoft.Json.JsonReader reader, System.Object value, System.Globalization.CultureInfo culture, Newtonsoft.Json.Serialization.JsonContract contract, System.Type targetType) [0x0007c] in <271c58b7a8684db5a2c92be17a81f252>:0