Problem: You are trying to activate WPML on your site, but updating the site past PHP version 7.4 breaks the theme. Additionally, activating WPML causes a critical error and crashes the site when accessing the translation dashboard. Solution: We have examined the issue and found that the WPML String Translation plugin causes the dashboard to become unavailable due to a critical error, although no errors are shown in the debug.log. We recommend increasing both the PHP memory limit and the WordPress memory limit to 512 MB to potentially resolve this issue. You can find instructions on how to increase the WordPress memory limit here.
If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket here.