There's an ongoing issue with forms products preventing the entry of special characters such as !"£$%^&*(). If you get an error 'The field TextValue is invalid' please check all text entry fields for these characters and replace them.
Please raise a case and reference the title of this article.
Unable to submit Mosaic portal forms
In this article, we explore why using '&' in a text box causes a 'TextValue is invalid' warning when submitting a form in Mosaic.
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Written by Yusef Abulaynain