We are trying to get the object identifier working but are having problems. We are using version 4.3 on the phones (Moto E4) and have deleted and reinstalled the .java file we imported but still get the following errors:

Build started at Tue Jan 08 2019 11:42:22 GMT-0800 (Pacific Standard Time)
org/firstinspires/ftc/teamcode/Minerals.java line 91, column 25: ERROR: cannot find symbol symbol: method getInstance() location: class org.firstinspires.ftc.robotcore.external.ClassFact ory org/firstinspires/ftc/teamcode/Minerals.java line 162, column 31: ERROR: cannot find symbol symbol: method getInstance() location: class org.firstinspires.ftc.robotcore.external.ClassFact ory org/firstinspires/ftc/teamcode/Minerals.java line 174, column 28: ERROR: cannot find symbol symbol: method getInstance() location: class org.firstinspires.ftc.robotcore.external.ClassFact ory

We used the example from onbot java with no changes made. Any help would be appreciated!