Symptoms

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View calendar on change request form shows error message "Invalid data found while accessing the Change Request Calendar"

Cause

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Script Include "ChangeCheckConflicts" is missing

Resolution

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Activate the plugin "Change Management - Collision Detector" which eventually will load script include "ChangeCheckConflicts" and that resolves the issue

Additional Information

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UI action "View Calendar" has condition "ChangeCheckConflicts.allowConflictDetection(current)", which checks script include "ChangeCheckConflicts" and this script include is part of plugin "Change Management - Collision Detector". This plugin should be active.