Website use to show sub-menu categories when you hover your mouse over primary categories and pages in the main menu but now nothing appears and I'm guessing this may be a PHP issue.
I've noticed that product Category Flat and Category Products need to be reindexed and would like to know if that may be part of the conflict?
Hell @w222011
Have you done with reindexing? If not please run indexing and check again. Thanks
Hello @w222011,
Please make sure luma theme set on store and there is some indexing issue, Please run below command of static content deploy and index in magento root directory
rm -rf pub/static/frontend/* pub/static/adminhtml/* var/cache/ var/generation/ var/page_cache/ var/view_preprocessed/ var/composer_home generated/ php bin/magento setup:static-content:deploy -f php bin/magento indexer:reindex php bin/magento cache:flush php bin/magento cache:clean
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If my answer is useful, please Accept as Solution & give Kudos