Sometimes you may experience errors when trying to push new objects to the publisher, that suggests that there is an invalid character or punctuation within the keyword text, creative, or URL. Please search for this exact error within our Help section first to see if a more detailed article is available that explains the issue and how to correct it.
If you have reviewed the relevant Support Center articles and are still unable to find any invalid characters/punctuation, please do the following to reveal if there is a hidden carriage return or special hidden character that is not visible in the Platform or seen in Excel:
Once you are able to identify the invalid character, you can then remove it. To see if this is true, use the Show/Hide paragraph tool in Microsoft Word to reveal any hidden formatting.