Title: Fatal Error on Install
Last modified: August 20, 2016

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# Fatal Error on Install

 *  Resolved [nvg](https://wordpress.org/support/users/nvg/)
 * (@nvg)
 * [14 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-on-install-4/)
 * Warning: Please change the value of prefix, on config/config.php in /home/myhome/
   www/mydomain.php/wp-content/plugins/pressbackup/.core/w2pf_init.php on line 53
 * Fatal error: Class name must be a valid object or a string in /home/myhome/www/
   mydomain.com/wp-content/plugins/pressbackup/main.php on line 15

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [infinimediainc](https://wordpress.org/support/users/infinimediainc/)
 * (@infinimediainc)
 * [14 years, 11 months ago](https://wordpress.org/support/topic/fatal-error-on-install-4/#post-2118734)
 * Hi nvg,
 * Has read permissions for all folders and files within pressbackup. that error
   says that WP can’t read config/config.php properly
 *  Thread Starter [nvg](https://wordpress.org/support/users/nvg/)
 * (@nvg)
 * [14 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-on-install-4/#post-2118765)
 * got it, thanx inf…
 *  [viyyer](https://wordpress.org/support/users/viyyer/)
 * (@viyyer)
 * [14 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-on-install-4/#post-2118805)
 * I have a similar error.
 * > Plugin could not be activated because it triggered a fatal error.
   > PressBackup: Please change the value of prefix, on config/config.php
   > Warning: Please change the value of prefix, on config/config.php in <snip>htdocs/
   > blog/wp-content/plugins/pressbackup/.core/w2pf_init.php on line 54
   > Fatal error: Class name must be a valid object or a string in <snip>htdocs/
   > blog/wp-content/plugins/pressbackup/main.php on line 15
 * I have full 777 permission for the pressbackup directory in plugins.
    I do have
   the blog in a subfolder and would this make a difference ? What should I enter
   in the prefix field ? Thanks

Viewing 3 replies - 1 through 3 (of 3 total)

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 * 3 replies
 * 3 participants
 * Last reply from: [viyyer](https://wordpress.org/support/users/viyyer/)
 * Last activity: [14 years, 6 months ago](https://wordpress.org/support/topic/fatal-error-on-install-4/#post-2118805)
 * Status: resolved