# Fatal error: Uncaught Error

**URL:** <https://www.dolibarr.org/forum/t/fatal-error-uncaught-error/21695>\
**Category:** Using my Dolibarr\
**Tags:** Setup-Configuration\
**Created:** [January 12, 2022, 11:28am UTC](https://www.dolibarr.org/forum/t/fatal-error-uncaught-error/21695 "2022-01-12T11:28:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Virusx2000](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/v/ac91a4/32.png) [@Virusx2000](https://www.dolibarr.org/forum/u/Virusx2000)\
**Post date:** [January 12, 2022, 11:28am UTC](https://www.dolibarr.org/forum/t/fatal-error-uncaught-error/21695/1 "2022-01-12T11:28:07Z")

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Help me please.  
After the last update from version 12 to version 14.0.5, the interface broke and when trying to enter Settings - Modules / applications, an error is issued: “Fatal error: Uncaught Error: Undefined constant” warning "in … / httpd.www / db / htdocs / core / lib / admin.lib.php: 655 Stack trace: # 0 … / httpd.www / db / htdocs / admin / modules.php (501): modules\_prepare\_head (1, 75) # 1 {main} thrown in … / httpd.www / db / htdocs / core / lib / admin.lib.php on line 655 "

As far as I understand, some modules were disabled, which caused problems in the kernel. Only basic modules were used.

How can you return Dolibarr to its original state without losing the accumulated data? Completely deleting files from the server and installing a new version with a connection to the existing database did not help, the same fatal error.

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**Author:** ![ksar](https://www.dolibarr.org/forum/user_avatar/www.dolibarr.org/ksar/32/514_2.png) [@ksar](https://www.dolibarr.org/forum/u/ksar)\
**Post date:** [January 12, 2022, 8:30pm UTC](https://www.dolibarr.org/forum/t/fatal-error-uncaught-error/21695/2 "2022-01-12T20:30:21Z")

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Hello,

Seems to be a BUG : [FIX : Fatal error on admin.lib by ksar-ksar · Pull Request #19824 · Dolibarr/dolibarr · GitHub](https://github.com/Dolibarr/dolibarr/pull/19824/files)

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**Author:** ![Virusx2000](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/v/ac91a4/32.png) [@Virusx2000](https://www.dolibarr.org/forum/u/Virusx2000)\
**Post date:** [January 12, 2022, 9:15pm UTC](https://www.dolibarr.org/forum/t/fatal-error-uncaught-error/21695/3 "2022-01-12T21:15:48Z")

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That helped. Thank you very much!