iPhoneでViberを使用していますが、特定のWiFi環境で、ﾒｯｾｰｼﾞが送信できなくなります。ずっと、”sending"を表記し最終的に"not sent"になります。何が理由なのでしょうか？

Hi there,

This is a member of the Viber R&D team.

We recently had server upgrades that caused a downtime in Viber service.

Please go ahead and try again.

If the problem persists please let us know.

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Thanks,
Viber team