[BUG]: snippets command does not work in modmail guild id

[Sasiko]

Bot Version

4.0.1

How are you hosting Modmail?

PM2

Error Logs

https://hastebin.cc/uwababupux.sql

Screenshots

No response

Additional Information

Bot is in 2 guilds configured as Guild ID and Modmail ID
!snippet commands works only in guild id while snippets result in the error from provided error logs when commands is executed in modmail guild

[Jerrie-Aries]

Related to #3205.

This is a known bug and being worked on, I believe.
The error was originated from a failure of getting the url of server icon.
For temp solution, make sure both guild and modmail guild have their icon set.