Error1 reports
Fix IllegalStateException
in Nx
✅ Solution
The "IllegalStateException" in nx often arises from duplicate task registrations within your nx.json or project configurations, such as defining the same target with identical executors multiple times. To resolve this, carefully review your nx.json, project.json (or equivalent config files), and any plugin configurations for redundant entries; remove any duplicate task definitions or consolidate them into a single, correctly configured target.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Jan 8, 2026
Last reported:Jan 8, 2026