Installation, Upgrade, and Import Support

1215 topics in this forum

1. Will WHMCS launch an update to path the critical PHP CVEs?

   By Grapes, October 21
   • 2 replies
   • 1k views
   • 
   • Grapes
   • October 22

2. Re-installing WHMCS Directory Already exists

   By SeanWestfield, September 16
   • 6 replies
   • 893 views
   • 
   • mancy34
   • October 12

3. Installation URL rename

   By Howard, January 30, 2024
   • 9 replies
   • 4.3k views
   • 
   • RadWebHosting
   • September 26

4. unable to remove credits and invoices dont raise on monthly subscriptions intermittently

   By Rajan Maharaj, June 27
   • 2 replies
   • 2.2k views
   • 
   • mancy34
   • September 15

5. The null-IV migration for application_link_client processed 100 rows with 0 errors.

   By Vox, August 22
   • 6 replies
   • 1.3k views
   • 
   • websolutionzoneUAE
   • September 1

6. WHMCS 8.13.1 - import from Blesta 5.11.5

   By leandrogbreve, June 3
   • 2 replies
   • 1.8k views
   • 
   • JNDEVELOPER
   • June 17

7. Credit & Debit Notes not found in menu

   By hmaddy, June 15
   • 1 reply
   • 596 views
   • 
   • WHMCS SamP
   • June 15

8. Does WHMCS support PHP 8.4?

   By Sudipto Mahmud, April 17
   • 4 replies
   • 2.8k views
   • 
   • hmaddy
   • June 15

9. Migration to new host

   By Anjina Parvin, March 7
   • 4 replies
   • 2.5k views
   • 
   • WHMCS Danny
   • June 12

10. Update WHMCS from 8.13.1 to 9.0 Critical Error --> Smarty: undefined extension class 'Smarty_Internal_Method_Get_Template_Vars' <--

    By SkyHost Networks, January 31
    • 12 replies
    • 3.9k views
    • 
    • SkyHost Networks
    • May 20

11. Bug: When using empty 'regions' in s3 storage and upgrading, you'll run into issues

    By twhiting9275, February 17
    • 4 replies
    • 5.2k views
    • 
    • bear
    • May 7

12. Auto-Debit ACH

    By ejmerkel, June 20, 2014
    • 4 replies
    • 10.9k views
    • 
    • Joshua A
    • April 29

13. WHMCS Installation with utf8mb4 Database - Potential Issues & Best Practices

    By centos777, October 15, 2025
    • 4 replies
    • 2.4k views
    • 
    • theozsnowman
    • April 17

14. Update Error

    By hmaddy, December 1, 2025
    • 4 replies
    • 2.5k views
    • 
    • joeroot6543
    • March 13

15. Illegal invoice changes

    By ju5t, June 5, 2018
    • 24 replies
    • 21.7k views
    • 
    • Damo
    • February 23

16. Upgrade from WHMCS 8.13 to 9 doesnt clean up vendor Folders

    By ptomter, January 24
    • 3 replies
    • 2.3k views
    • 
    • BENELUX
    • February 11

17. SMTP Passwordless issue

    By Marwan9090, January 20
    • 1 reply
    • 1.5k views
    • 
    • RadWebHosting
    • January 25

18. old WHMCS update process planning

    By Walther, December 17, 2025
    • 3 replies
    • 2.6k views
    • 
    • zomex
    • December 22, 2025

19. Full Support

    By romerositios, November 4, 2025
    • 2 replies
    • 1.7k views
    • 
    • wtools
    • November 30, 2025

20. About email verification challenge for newly register client

    By Sudipto Mahmud, November 9, 2025
    • 2 replies
    • 1.9k views
    • 
    • wtools
    • November 30, 2025

21. Upgrade Error

    By hmaddy, November 21, 2025
    • 2 replies
    • 1.9k views
    • 
    • wtools
    • November 30, 2025

22. HOW TO UPGRADE SQL FOR CPANEL

    By BABYKEY, October 28, 2025
    • 1 reply
    • 2k views
    • 
    • RadWebHosting
    • November 4, 2025

23. Update Doubts

    By hmaddy, October 24, 2025
    • 1 reply
    • 1.9k views
    • 
    • WHMCS SamP
    • October 26, 2025

24. Problem with upgrading WHMCS

    By georgiathomp, October 20, 2025
    • 0 replies
    • 1.2k views
    • 
    • georgiathomp
    • October 20, 2025

25. SupportPal -> WHMCS

    By slim, May 30, 2025
    • 8 replies
    • 4.6k views
    • 
    • AMateos
    • October 15, 2025