Fix ApplicationContextException

✅ Solution

ApplicationContextException in Nexus Repository usually stems from database connection problems, corrupted database schemas, or incompatible database drivers after upgrades. Resolve this by verifying database connection details in nexus.properties, ensuring the correct database driver is installed, and running database migration scripts if necessary via the Nexus admin console or command line. If migrations fail, consider restoring from a backup to a point before the upgrade attempt.