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Fatal error accessing administation page (14.0.0RC1) #1772

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opened 2026-10-05 00:56:18 +02:00 by adam · 1 comment
adam commented 2026-10-05 00:56:18 +02:00
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I was in the process of adding a creation date to a set of 19 images I had just uploaded, and upon trying to save the changes, the page reloads and displays this message: Fatal error: Uncaught Error: Call to undefined function mb_substr() in /path/topiwigo/admin/intro.php:397 Stack trace: #0 /path/to/piwigo/admin.php(346): include() #1 {main} thrown in /path/to/piwigo/admin/intro.php on line 397.

The gallery site loads just fine, it's only trying to access the administration page where this error is displayed. This is all with php8.2.

EDIT: It looks like only the Dashboard page of the admin tools is inaccessible. Navigating directly with something like admin.php?page=tags works correctly.

I was in the process of adding a creation date to a set of 19 images I had just uploaded, and upon trying to save the changes, the page reloads and displays this message: `Fatal error: Uncaught Error: Call to undefined function mb_substr() in /path/topiwigo/admin/intro.php:397 Stack trace: #0 /path/to/piwigo/admin.php(346): include() #1 {main} thrown in /path/to/piwigo/admin/intro.php on line 397`. The gallery site loads just fine, it's only trying to access the administration page where this error is displayed. This is all with php8.2. EDIT: It looks like only the Dashboard page of the admin tools is inaccessible. Navigating directly with something like `admin.php?page=tags` works correctly. <!-- github-sync-id:1993136121 -->
adam closed this issue 2026-10-05 00:56:18 +02:00
adam commented 2026-10-05 00:56:19 +02:00
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See these forum topics:

See these forum topics: * https://piwigo.org/forum/viewtopic.php?id=31170 * https://piwigo.org/forum/viewtopic.php?id=30888 <!-- github-comment-id:1812042057 -->
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Reference: adam/Piwigo#1772