White page after update to Joomla! 3.9.25

[VorMike]

Hi,
I've been using Joomla! for some years now and never had any problems. Unfortunately this changed day before yesterday when I did the update from 3.9.24 to 3.9.25 from within the backend.
After that update I got a white page when starting either the front or the backend. I was able to trace the error in the frontend to this message:

Code: Select all

Warning: Use of undefined constant JDEBUG - assumed 'JDEBUG' (this will throw an Error in a future version of PHP) in /hp/as/ab/fg/www/mike-on-tour/index.php on line 41

Fatal error: Uncaught Error: Class 'JProfiler' not found in /hp/as/ab/fg/www/mike-on-tour/index.php:41 Stack trace: #0 {main} thrown in /hp/as/ab/fg/www/mike-on-tour/index.php on line 41

When commenting this line out the next error message is:

Code: Select all

 Fatal error: Uncaught Error: Class 'JFactory' not found in /hp/as/ab/fg/www/mike-on-tour/index.php:44 Stack trace: #0 {main} thrown in /hp/as/ab/fg/www/mike-on-tour/index.php on line 44

Apparently there are some classes missing, but all the subdirectories are on the server.
Can somebody please point me in the right direction to solve this issue?

[pe7er]

Welcome to Joomla forum!

Did you make a backup before doing the update?
If so, restore the backup.

If not, make a backup (files + database) of the current situation before continuing so that you can revert to the current situation if the fixes you try, do not workt:

I would download a Full Package Joomla 3.9.25: https://downloads.joomla.org/cms/joomla3/3-9-25
Unzip it at a local computer and upload all files + folders (except /installation/ folder).

[VorMike]

I did a backup before updating, with Akeeba. Unfortunately I can't reach this backup since I can not get into the backend to restore it - catch 22
I've already downloaded the full package and checked the files and directories against those on the server, everything is there, so where to look for the culprit?

[pe7er]

I can't reach this backup since I can not get into the backend to restore it - catch 22

You can find the backup in /administrator/components/com_akeeba/backup/
(I would download all backups to your local computer).
You can use Akeeba's kickstart.php to install the backup.

Have you only checked, or also re-uploaded all files + folders (except /installation/ folder) to the server?

[Webdongle]

...
You can find the backup in /administrator/components/com_akeeba/backup/
(I would download all backups to your local computer).
You can use Akeeba's kickstart.php to install the backup.

...

unless you changed the default save location.


After you restore your site
Check all extensions are up to date and set Protostar as default Template.

How did you install Joomla?

[VorMike]

You can use Akeeba's kickstart.php to install the backup.

Thanks to this tip from pe7er I was able to get the previous version (3.9.24) up and running again.

After you restore your site
Check all extensions are up to date and set Protostar as default Template.

How did you install Joomla?

I guess you meant how did I update it? Via the update link within the backend, which I did since 3.8.1 without any difficulties.
The extensions installed are

• Akeeba backup
• JComment
• JoomGallery

And I did the Akeeba Update (7.5.1 -> 8.0.1) prior to updating Joomla to 3.9.25 together with the German language pack.
Is any of these extensions incompatible with 3.9.25?

[Webdongle]

No you second guessed me incorrectly.
How did you install Joomla in the first place?

[VorMike]

I don't know anymore, that was some years ago. I guess I uploaded the files and started some install process.
Why is that important for an update?

[Webdongle]

Sometimes people use 3rd party quick start packages and that can cause problems with updates. Joomla updates are tested on Joomla installs not sites installed using modified 3rd party scripts.

[VorMike]

Okay, but I'm aware of the difficulties originating from 3rd party software used to install software on a server (it is the same with phpBB which is used to run this forum).
Anyway, 3.9.24 is working and now I have to do the update again, but this time I will have a copy of the files on the server and a database backup as well.

Thanks again for helping me.

[Webdongle]

Okay, but I'm aware of the difficulties originating from 3rd party software used to install software on a server ...

Not judging your knowledge, just giving my reason for my question as you requested.