[Mailman-Users] UnicodeDecodeError accessing into web admin interface

[Ferriol]

Hi,

I'm trying to access to the web admin interface and I can't
After authentication says "Bug in Mailman version 2.1.13"

I looked to the mailman error and read:
admin(14653): [----- Mailman Version: 2.1.13 -----]
admin(14653): [----- Traceback ------]
admin(14653): Traceback (most recent call last):
admin(14653):   File "/var/lib/mailman/scripts/driver", line 112, in
run_main
admin(14653):     main()
admin(14653):   File "/var/lib/mailman/Mailman/Cgi/admin.py", line 197,
in main
admin(14653):     print doc.Format()
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 336,
in Format
admin(14653):     output.append(Container.Format(self, indent))
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 265,
in Format
admin(14653):     output.append(HTMLFormatObject(item, indent))
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 51,
in HTMLFormatObject
admin(14653):     return item.Format(indent)
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 422,
in Format
admin(14653):     output = output + Container.Format(self, indent+2)
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 265,
in Format
admin(14653):     output.append(HTMLFormatObject(item, indent))
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 51,
in HTMLFormatObject
admin(14653):     return item.Format(indent)
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 201,
in Format
admin(14653):     output = output + self.FormatRow(i, indent + 2)
admin(14653):   File "/var/lib/mailman/Mailman/htmlformat.py", line 189,
in FormatRow
admin(14653):     output = output + self.FormatCell(row, i, indent + 2)
admin(14653): UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3
in position 71: ordinal not in range(128)

If I tried access directly to the subscribers list, it works:
https://server_name/admin/list_name/members

If I access https://server_name/admin/list_name/ crash
Crashes too in
https://server_name/admin/list_name/nondigest
https://server_name/admin/list_name/topics
All other pages of the web admin interface works

I tried to look the configuration in command line executing:
config_list -o file list_name
But also raises UnicodeDecodeError

I don't know how can I find which configuration value is the problem ?
And when I'll find I don't know how can I fix it...

Please, any Idea ?

Thanks in advance !!!