Unable to render known webpage

A client is currently running their HTM5/javascript adequately off the ET1 running RhoElements v1.0.3.11 and decided to test RhoEv2.0.5.27 in the hope of improving performance but has encountered a problem with:

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“You have attempted to access a

restricted URL.”

The URL contains an invalid parameter.

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Navigating to the site with Chrome a security alert is displayed... prompting the user to accept the site as a trusted site. This popup doesn't displayed in RhoElements version 1 or 2, yet the site renders properly in version 1 but not in version 2.

Helpdesk case 2613903 was created.