Thank you for the quick fix. I ll try it now. The full error message:
PHP Fatal error: Uncaught TypeError: Argument 2 passed to relevanssi_wpml_term_fix() must be of the type array, object given, called in /home/#/public_html/wp-includes/class-wp-hook.php on line 287 and defined in /home/#/public_html/wp-content/plugins/relevanssi/lib/compatibility/wpml.php:122
Stack trace:
#0 /home/#/public_html/wp-includes/class-wp-hook.php(287): relevanssi_wpml_term_fix('', Object(WP_Error), 'pa_diathesimoti...', 21889)
#1 /home/#/public_html/wp-includes/plugin.php(212): WP_Hook->apply_filters('', Array)
#2 /home/#/public_html/wp-content/plugins/relevanssi/lib/indexing.php(646): apply_filters('relevanssi_tag_...', '', Object(WP_Error), 'pa_diathesimoti...', 21889)
#3 /home/#/public_html/wp-content/plugins/relevanssi/lib/indexing.php(540): relevanssi_index_taxonomy_terms(Array, 21889, 'pa_diathesimoti...', false)
#4 /home/#/public_html/wp-content/plugins/relevanssi/lib/indexing.php(805): relevanssi_index_doc(21889, true, 'all', true)
#5 /home/#/public_ht in /home/#/public_html/wp-content/plugins/relevanssi/lib/compatibility/wpml.php on line 122
