The summoner name or tag is incorrect
snow #2424
SILVER I
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 110
1,337,438
lvl: 15
140,081
lvl: 14
122,837
lvl: 14
120,996
lvl: 13
115,063
lvl: 9
69,117
lvl: 7
52,911
lvl: 6
36,016
lvl: 6
32,887
lvl: 5
29,533
lvl: 5
27,656
lvl: 5
26,063