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PHP fatal error because of bug in PHP 7.3.0

Resolved

Overview of the issue

If you use PHP 7.3.0 you may see the following fatal error due to a bug that is in PHP 7.3.0:

PHP Fatal error:  Uncaught Error: Call to undefined method WPML\FP\Json::toCollection()

Workaround

Please update to at least PHP 7.3.2.