Possible causes:

1. Yoast SEO plugin ya WordPress ka version mismatch – Naye WordPress version ke saath purana Yoast version chal raha ho ya vice versa.
2. Conflict with other plugins – Kisi aur plugin ka JavaScript Yoast ke scripts ko override kar raha ho.
3. Theme compatibility issue – Agar theme outdated hai ya Yoast ke hooks/scripts ko override kar rahi hai.
4. Incomplete or corrupted plugin update – Update ke time files incomplete copy hui ho.

Fix steps:

1. Yoast SEO update karein – Latest version install karke dekhein.
2. WordPress core update karein – Ensure karein ke WP ka latest stable version use ho.
3. Plugin conflict check karein
   • Temporarily sare plugins disable karein except Yoast SEO.
   • Agar error khatam ho jaye, ek-ek karke enable karke culprit plugin identify karein.
4. Theme switch test
   • Default theme (Twenty Twenty-Five) activate karke dekhein error jaata hai ya nahi.
5. Clear cache – Browser cache aur agar koi caching plugin hai to uska cache bhi clear karein.
6. Plugin re-install karein – Yoast SEO delete karke dobara fresh install karein (settings pehle export kar lein).

Agar ye sab ke baad bhi issue rahe, to Yoast support ko exact error console screenshot ke saath report karein, kyunki ye mostly JavaScript function deprecate hone ka case hota hai.