This thread is resolved. Here is a description of the problem and solution.
Problem: Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Argument ID must be numeric and greater than 0.'
Solution: Upgrading the plugin to Latest version 3.6.1 solved the issue.
Relevant Documentation: https://wpml.org/errata/fatal-error-uncaught-exception-invalidargumentexception/
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.