mysqli_num_fields() expects parameter 1 to be mysqli_result

Hello
how many plugins had you installed?
do you know this error is reflect to any specific plugins?
thanks

Hello,
I am getting the same error and it is breaking my site. I have centralized it to your plugin. No other plugins on my site call mysqli_fetch_field.

This is the code in question: (File name: Enterprise_Dbcache_WpdbInjection_Cluster.php Line#: 518)

$this->wpdb_mixin->result = mysqli_query( $query, $this->wpdb_mixin->dbh );

Looks like the query results code is a little dyslexic.
Should be:

$this->wpdb_mixin->result = mysqli_query( $this->wpdb_mixin->dbh, $query );

Please fix and issue and immediate update.
Thank you.

Best,
designdrumm

I have changed on my end and tested and this fixes this issue for me.

Looks like you have multiples of these dyslexic queries.

Found this one too:

$this->wpdb_mixin->_last_found_rows_result = mysqli_query( "SELECT FOUND_ROWS()", $this->wpdb_mixin->dbh );

Should be:

$this->wpdb_mixin->_last_found_rows_result = mysqli_query( $this->wpdb_mixin->dbh, "SELECT FOUND_ROWS()" );

After further searching, it looks like your use of any mysqli_(*) that requires the database handle are all set wrong. The database handle I believe has to be the first parameter. May want to comb your code again as it looks to be spread throughout your plugin.

Look forward to an update. I enjoy your plugin.
Thanks for your efforts!

Best,
designdrumm

Correction, that did not fix it for me. Still same problem.