Error appearing on admin side

[ltempest]

I get this error when viewing the files tab in Phoca Download iles in the admin side:

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/gloscic/public_html/libraries/joomla/database/database/mysqli.php on line 305

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/gloscic/public_html/libraries/joomla/database/database/mysqli.php on line 305

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/gloscic/public_html/libraries/joomla/database/database/mysqli.php on line 305

Any ideas?

Thanks

Lee

[ep98]

Turn off error messages from Joomla! configuration, this are warnings only. May exist some incompatibilities in the different versions of hosting providers. Always check Joomla! requirements, before you pay for something that will not work for your needs.

[Jan]

Search this forum, as this was solved many times.

Enabling debug mode says if there is some error in database. Mostly this error is displayed in case, some column is missing (mostly column is missing if the component were not successfully installed. E.g. someone click on upgrade and there was no previous version - to install all columns and tables in database, you need to click on Install not Upgrade in case e.g. the version is a first version. For example Phoca Download 2.0.0 is a stable, so while installing of Phoca Download stable 2.0.0 you cannot click on upgrade)

Jan