00057: Layer name contains invalid characters
You are sharing a map image layer or web imagery layer with a WMS layer or WCS capability turned on. A layer in the map or selection of layers being shared has a name that contains URL or XML reserved characters that are invalid for use with WMS or WCS.
Solutions
Rename the layer so that it does not include any URL or XML reserved characters.
If you are sharing a WMS layer, you can choose not to use layer names. You can use zero-based integers to identify layers by unchecking Use layer names from the map in the WMS layer configuration.
More information
The following are reserved characters:
&
<
>
"
'
?
@
=
$
~
^
`
#
%
*
(
)