The summoner name or tag is incorrect
debug #1957
SILVER II
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Match History for Patch: 16.9.1
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Champion Stats for Patch: 16.9.1
Champion Mastery
lvl: 46
481,101
lvl: 29
286,567
lvl: 25
240,912
lvl: 23
224,754
lvl: 21
203,370
lvl: 17
162,584
lvl: 15
154,108
lvl: 14
130,935
lvl: 14
127,519
lvl: 13
121,966
lvl: 13
114,502
lvl: 13
113,868