Error when I try to list emails for any domain

Hello, when I try to list the emails for any of the domains in my cyberpanel, I receive this error in the upper right corner:

‘ascii’ codec can’t decode byte 0xd0 in position 1030: ordinal not in range(128)

And I can’t list the emails, it just stay at the screen where I choose the domain.

Anyone knows how to fix this?