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Fix MySQL 'Access Denied for User 'user'@'%'' Error - Fix 0x80040201 Chrome Sync Problem-Fixing Nginx Permission Denied for Upstream Unix Socket

2026-06-13 14:34:44
Fix MySQL 'Access Denied for User 'user'@'%'' Error - Fix 0x80040201 Chrome Sync Problem-Fixing Nginx Permission Denied for Upstream Unix Socket

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.