We are trying to change the WPML Language URL format from:
“A different domain per language”
to
“Different languages in directories”
Environments:
POC (works): hidden link
Test (issue): hidden link
Production (issue): hidden link
Issue on Test/Prod:
Selecting the option does nothing (no loader, no sub-options appear).
On Save → page reloads → White Screen of Death.
Setting remains unchanged.
Console Error:
Uncaught TypeError: WPML_core.sanitize is not a function
All WPML plugins on sites are up-to-date:
WPML CMS
String Translation
ACF Multilingual
CF7 Multilingual
WPML SEO
Same codebase works on POC but fails on Test/Prod.
Please advise what may cause this JS error and how to resolve it.
