Please make sure to update to WPML 4.3.6 and check our list of Known Issues before reporting
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This thread is resolved. Here is a description of the problem and solution.
Activate WPML and I get this issue:
Fatal error: Class WPML_Term_Translation contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (WPML_Element_Translation::get_type_prefix) in /home4/alluarec/public_html/wp-content/plugins/1sitepress-multilingual-cms/inc/taxonomy-term-translation/wpml-term-translation.class.php on line 13
Following these steps would resolve the issue:
1. Use FTP, go to wp-content/plugins.
2. Delete all WPML plugin folders.
3. Download the latest versions from https://wpml.org/account/downloads/ and re-install them.