バックナンバーの購入出来ないエラーについて

公式ツイッターよりアナウンスがありました。
ご報告いたします

Google Translate↓

Ci-en Official

It has been occurring since last night,
Regarding the case where back number cannot be purchased, the correction has been completed.
We apologize for the inconvenience caused to the creators and supporters.

In addition, it occurs in some users
We are currently working on problems related to viewing paid plan benefits.
Again, we apologize for the inconvenience.