Problem:

I am encountering a 502 error when viewing translated event category archives using WPML. The error occurs even after trying default themes and disabling most plugins. The issue only affects translated event categories.

Solution:

After deactivating all plugins except WPML and Toolset, the 502 error disappears. This suggests that one of the other plugins is causing the issue. You should reactivate plugins one by one to identify the problematic plugin. In this case, deactivating the EWWW and Iubenda plugins resolved the issue. These plugins likely cause a conflict, possibly due to JavaScript errors. Consider using alternatives or reaching out to the plugin developers for support.

Relevant Documentation:

https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/502