Thanks for writing to us.
It might be the issue of cache, I would suggest you please purge all the cache and clear your browser’s cache then check it again or it would be best if you could check it in the private mode of the browser.
In case if it doesn’t work for you I would suggest you go to the Plugins—>Deactvate & delete the plugin —>Now download the fresh copy of the plugin and install it again.
Please note you must take the database and files backup before deleting the slider plugin from the site. If none of those work, please send your details in a secure note. Please provide the following details
- WordPress Login URL
- Admin level username and password
You can find the Secure Note button at the bottom of your posts