6.2.X EE, 7.0.0 M3
Steps to reproduce:
- Navigate to Admin > Content > Web Content > Manage > Templates > Add
- In the Add Template iframe, click Details
- Toggle the language to XSL
- On the bottom of the iframe, click Browse... to upload a file
- Choose the attached (xsl_template.xsl) file on this ticket
User will be able to upload this xsl file as a template.
Iframe reloads giving a "Your request failed to complete.
Please enter a valid script." UI failure message.
Note: Users can upload .txt files, but .xsl is blocked