Fiddler League of legends question

[Filip]

Hello Filip again, so im playing around with fiddler on League of legends and i get this error when i change some of the value, is there any fix>?

and one more question, so this is the league of legends shop

and now i lost the 6300 Blue essence is there anyway to bug or glitch the shop so it doesn't take any blue essence?

From Filip

[Filip]

Oh i forgot to add i bugged/glitched the shop once without the help of fiddler but i don't know how i did it, i remember getting some error when i bought the champion but i got it for free then i bought all the rest of the champions without losing a single blue essence.
From Filip