Hello!
You need to be on stage 1.
STEPS:
1.Open Game Guardian.
2.In the search tab for Value-Known write 1 (Stage you are at), TYPE = Dword and tick encrypted;
3.Go ahead and reach stage 2 and repeat STEP 2 but this time search for 2 ( your stage value ); (Do this until you get to stage 4 or 5)
4.When you get to stage 4 or 5 you should only see 3 values but the one you are interested in is : "-1 908 683 590";
5.You need to modify ONLY the LAST 3 digits. From my experience I got some numbers you can use:
VALUE STAGE
713 129
009 577
209 649
079 517
064 630
From what I have seen the highest I could go without "Teapot" was Stage 649. So replace the last 3 digits with 209, restart the game and it will work without getting you "Teapot" error.
Same method for hero level, you will get the same number, the highest you can use without "Teapot" is 779 which will give you a hero level of 1869 (+-).