Title: Conditional logic Field Selection
Last modified: February 21, 2018

---

# Conditional logic Field Selection

 *  Resolved [magaworks](https://wordpress.org/support/users/magaworks/)
 * (@magaworks)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/conditional-logic-field-selection/)
 * Hi,
    I am trying to have some conditional logic but my Field Selectino is empty.
   I have a lot of other form fields in this form so I do not understand why the
   field selection does not show any field at all.
 * Can you help me?
 * I am using a theme from themeforrest and all plugins are updated.
 * Thanks.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fconditional-logic-field-selection%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Thread Starter [magaworks](https://wordpress.org/support/users/magaworks/)
 * (@magaworks)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/conditional-logic-field-selection/#post-9999935)
 * Here are the error I get in Debug:
 *     ```
       ( ! ) Fatal error: Uncaught Error: Call to undefined function mb_detect_encoding() in /home/eficienc/public_html/wp-content/plugins/ultimate-member/core/um-filters-fields.php on line 396
       ( ! ) Error: Call to undefined function mb_detect_encoding() in /home/eficienc/public_html/wp-content/plugins/ultimate-member/core/um-filters-fields.php on line 396
       ```
   
 * Can you help me?
 *  Plugin Support [Ultimate Member Support](https://wordpress.org/support/users/ultimatemembersupport/)
 * (@ultimatemembersupport)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/conditional-logic-field-selection/#post-10006775)
 * Hi [@magaworks](https://wordpress.org/support/users/magaworks/),
 * Please enable mbstring php extension on your server, if you are not sure how 
   to do it please contact your hosting provider for assistance.
 * Regards.
 *  Thread Starter [magaworks](https://wordpress.org/support/users/magaworks/)
 * (@magaworks)
 * [8 years, 3 months ago](https://wordpress.org/support/topic/conditional-logic-field-selection/#post-10008586)
 * Did that and now it works 🙂
    Thanks for the great support.

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

The topic ‘Conditional logic Field Selection’ is closed to new replies.

 * ![](https://ps.w.org/ultimate-member/assets/icon-256x256.png?rev=3160947)
 * [Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin](https://wordpress.org/plugins/ultimate-member/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/ultimate-member/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/ultimate-member/)
 * [Active Topics](https://wordpress.org/support/plugin/ultimate-member/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/ultimate-member/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/ultimate-member/reviews/)

## Tags

 * [conditional logic](https://wordpress.org/support/topic-tag/conditional-logic/)
 * [Field selection](https://wordpress.org/support/topic-tag/field-selection/)

 * 3 replies
 * 2 participants
 * Last reply from: [magaworks](https://wordpress.org/support/users/magaworks/)
 * Last activity: [8 years, 3 months ago](https://wordpress.org/support/topic/conditional-logic-field-selection/#post-10008586)
 * Status: resolved