Let's encrypt 遇到 'ascii' codec can't decode byte 0xe5 的解法

Let's encrpyt 在更新憑證的時候,遇到下述錯誤訊息:

Attempting to renew cert (example.com) from /etc/letsencrypt/renewal/example.com.conf produced an unexpected error: 'ascii' codec can't decode byte 0xe5 in position 2: ordinal not in range(128). Skipping.

要怎麼解決呢?

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