hmaddy Posted December 1, 2025 Share Posted December 1, 2025 (edited) Am using whmcs 8.3 with php74. i would like to upgrade it to latest version and php. but its throwing some errors during upgrade process. Error (Help Documentation) Error: proceeding. ents/crons/). Please verify your existing installation configuration before m crons directory could not be located as configured (/home/public_html/cli A configuration file and/or existing installation has been found, but custo In ComposerInstaller.php line n/a: Script WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd handling the post-update-cmd event terminated with an exception ------------------------------------- WHMCS Installation/Update Assistant ------------------------------------- > WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd Writing lock file Unzip with unzip command failed, falling back to ZipArchive class The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems) The Process class relies on proc_open, which is not available on your PHP installation. File signature was validated Certificate used for signature validation was loaded and validated File hash was validated. Hash: 6555de4e06a3a717faf7c8030737436c8e4c6a592df04c293e8c07122e80a252 - Installing whmcs/whmcs (8.13.1):Downloading(100%)Validating /home/hostn/public_html/clients/vendor/whmcs/whmcs/f0fbf71a63d52b5b3918295993ee1fd5.zip Package operations: 1 install, 0 updates, 0 removals Updating dependencies Loading composer repositories with package information Edited December 1, 2025 by hmaddy 0 Quote Link to comment Share on other sites More sharing options...
Ebin V Thomas Posted March 2 Share Posted March 2 did you fixed this issue ? 0 Quote Link to comment Share on other sites More sharing options...
joeroot6543 Posted March 10 Share Posted March 10 On 12/2/2025 at 2:26 AM, hmaddy said: Am using whmcs 8.3 with php74. i would like to upgrade it to latest version and php. but its throwing some errors during upgrade process. Error (Help Documentation) Error: proceeding. ents/crons/). Please verify your existing installation configuration before m crons directory could not be located as configured (/home/public_html/cli A configuration file and/or existing installation has been found, but custo In ComposerInstaller.php line n/a: Script WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd handling the post-update-cmd event terminated with an exception ------------------------------------- WHMCS Installation/Update Assistant ------------------------------------- > WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd Writing lock file Unzip with unzip command failed, falling back to ZipArchive class The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems) The Process class relies on proc_open, which is not available on your PHP installation. File signature was validated Certificate used for signature validation was loaded and validated File hash was validated. Hash: 6555de4e06a3a717faf7c8030737436c8e4c6a592df04c293e8c07122e80a252 - Installing whmcs/whmcs (8.13.1):Downloading(100%)Validating /home/hostn/public_html/clients/vendor/whmcs/whmcs/f0fbf71a63d52b5b3918295993ee1fd5.zip Package operations: 1 install, 0 updates, 0 removals Updating dependencies Loading composer repositories with package information I actually have the same question because I’m trying to upgrade WHMCS from 8.3 to the latest version while also moving to a newer PHP version, and I’m running into very similar errors. During the upgrade process, I keep seeing messages about missing crons directories, issues with the Composer post-update-cmd hook, and fallback errors with unzip and ZipArchive. Even after verifying permissions and cleaning caches, the process doesn’t complete smoothly, and it’s unclear whether the errors are due to file naming issues, PHP configuration, or missing system functions like proc_open. I’m also trying to figure out the best approach to resolve this without breaking the existing installation. It seems like ensuring the correct PHP extensions are enabled, checking file system case sensitivity, and confirming directory paths might help, but there isn’t a clear step-by-step guide for this scenario. If anyone has successfully upgraded WHMCS under similar conditions and can share the exact sequence of steps, it would be really useful because I’m dealing with the same errors and want to make sure the upgrade finishes correctly. 0 Quote Link to comment Share on other sites More sharing options...
slim Posted March 11 Share Posted March 11 Update PHP first to a version that's compatible with BOTH the existing and the new version to be installed. Make sure the existing system health page reports everything is OK. Then try updating WHMCS. Once update is successful, and you have a working WHMCS, you can attempt to update PHP again to the latest supported version, for whatever version of WHMCS you are upgrading to. 1 Quote Link to comment Share on other sites More sharing options...
joeroot6543 Posted March 13 Share Posted March 13 On 12/2/2025 at 2:26 AM, hmaddy said: Am using whmcs 8.3 with php74. i would like to upgrade it to latest version and php. but its throwing some errors during upgrade process. Error (Help Documentation) Error: proceeding. ents/crons/). Please verify your existing installation configuration before m crons directory could not be located as configured (/home/public_html/cli A configuration file and/or existing installation has been found, but custo In ComposerInstaller.php line n/a: Script WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd handling the post-update-cmd event terminated with an exception ------------------------------------- WHMCS Installation/Update Assistant ------------------------------------- > WHMCS\Installer\Composer\Hooks\ComposerInstallerHook::postUpdateCmd Writing lock file Unzip with unzip command failed, falling back to ZipArchive class The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems) The Process class relies on proc_open, which is not available on your PHP installation. File signature was validated The situation reminds me of logistics workflows in 3PL essential oils fulfillment. Certificate used for signature validation was loaded and validated File hash was validated. Hash: 6555de4e06a3a717faf7c8030737436c8e4c6a592df04c293e8c07122e80a252 - Installing whmcs/whmcs (8.13.1):Downloading(100%)Validating /home/hostn/public_html/clients/vendor/whmcs/whmcs/f0fbf71a63d52b5b3918295993ee1fd5.zip Package operations: 1 install, 0 updates, 0 removals Updating dependencies Loading composer repositories with package information Thanks for the guidance that makes sense. I think I may have tried to move too many components at once by upgrading WHMCS and PHP together. Based on your suggestion, I’ll first upgrade PHP to a version that is compatible with both my current installation (WHMCS 8.3 on PHP 7.4) and the newer WHMCS version I’m targeting. I’ll also double-check the System Health Status page to make sure there are no warnings or configuration issues before attempting the WHMCS upgrade again. Once WHMCS is successfully upgraded and confirmed to be working properly, I’ll then proceed with upgrading PHP to the latest version supported by that WHMCS release. Hopefully taking it step-by-step like this will avoid the errors I encountered during the upgrade process. Appreciate the clarification it gives me a clearer upgrade path to follow. 0 Quote Link to comment Share on other sites More sharing options...
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