W3 Total Cache created a critical error on my site

I have had the same problem with W3 Total Cache. This worked for me:

Delete these wp-content files and folders
– cache folder
– w3tc-config folder
– object-cache.php (if exists)
– advanced-cache.php (if exists)
– dbcache.php (if exists)

Hello @faithvu

I am sorry about the issue you are experiencing and I am happy to assist you with this.
@kweist Thank you for the info.
If the Object Cache is the issue, you can simply delete the wp-content/cache/object folder and wp-content/object-cache.php, and also you can delete the w3tc-config folder.
These steps will ensure that Object Caching is disabled. Also make sure to disable Object Cache in Performance>General settings, and save all settings.
As for Object Caching in general, Object Cache allows getting data from the database more efficiently. Its purpose is similar to what Database Cache does. But compared to Database Cache, Object cache is more efficient as it allows us to process fewer requests.
As a rule of thumb, Object Cache is not worth using on shared hosting for the same reason as Database Cache, i.e. database is often not the performance bottleneck, but disk input-output operations.
However, like Database Cache, it can be beneficial to use if you are on VPS or a dedicated server, get a lot of traffic, have a lot of comments. Also, if you know that database is the bottleneck of your website performance, then Object Cache (like Database Cache) is beneficial to use. But in this case, it’s recommended to use Memcached or Redis options.
Thanks!