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errors, resolved error, Updates
(English) Resolved: Error in KATANA’s payments system
对不起，此内容只适用于美式英文和希腊文。
(English) With the support of dept. of Informatics, Ionian University
对不起，此内容只适用于美式英文和希腊文。
https://www.youtube.com/watch?v=_lSoLXhMzx8