Hey Sunando,
Followed your suggestions.
1. Nothing change.
2. Deactivated Polylang, Ninja Form, and two other plugins. Polylang was the one causing the issue. However, the past few month Polylang was there all along and there was no new update too. After I deactivated and activated few times, everything is working again. :/
Hopefully it won’t happen again.
Thank you for your help!
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This reply was modified 7 years, 7 months ago by jsj90.