Issue Joomla Toolkit - Cannot access offset of type string on string

[RalfMeyer]

Server operating system version

Debian 11

Plesk version and microupdate number

Plesk Obsidian 18.0.76.2

Hi everyone,

Does anyone else have an issue with Joomla Toolkit where, after installing a Joomla instance from within the toolkit, it does not show up in it?

When clicking on the "Joomla" button directly at the domain we get an error:

Type	TypeError
Message	Cannot access offset of type string on string
File	UiLibrary.php
Line	79

We also get the same error, when running "plesk ext joomla-toolkit --instances-list":

$ plesk ext joomla-toolkit --instances-list
Cannot access offset of type string on string

Thanks for your help.

 

[Sebahat.hadzhi]

Hi, @RalfMeyer . Does that happen for all Joomla instances or for a particular website only?

 

[RalfMeyer]

Hi @Sebahat.hadzhi, Thank you for your reply. It seems to happen for all Joomla instances.

 

[Sebahat.hadzhi]

Thank you for the confirmation. Could you please try reinstalling the Joomla extension?

plesk bin extension --uninstall joomla-toolkit
plesk bin extension --install joomla-toolkit

 

[RalfMeyer]

Hi @Sebahat.hadzhi, we get the following error when trying to uninstall it. I am not sure if this is related:

[2026-03-02 19:07:12.833] 2679666:69a5d1d0cb63c ERR [extension/joomla-toolkit] The execution of pre-uninstall.php has failed with the following message:
[2026-03-02 19:07:12.826] 2679668:69a5d1d0c989a ERR [panel] Site without PhysicalHosting cannot be Webspace:
0: /opt/psa/admin/plib/Webspace.php:556
    Webspace->_loadPHosting()
1: /opt/psa/admin/plib/Webspace.php:490
    Webspace->getPHosting()
2: /opt/psa/admin/plib/Webspace.php:460
    Webspace->getSysUser()
3: /opt/psa/admin/plib/Webspace.php:191
    Webspace->getRootPath()
4: /opt/psa/admin/plib/pm/Domain.php:377
    pm_Domain->getHomePath()
5: /opt/psa/admin/plib/modules/joomla-toolkit/scripts/pre-uninstall.php:8
ERROR: PleskFatalException: Site without PhysicalHosting cannot be Webspace (Webspace.php:556)
The execution of pre-uninstall.php has failed with the following message:
[2026-03-02 19:07:12.826] 2679668:69a5d1d0c989a ERR [panel] Site without PhysicalHosting cannot be Webspace:
0: /opt/psa/admin/plib/Webspace.php:556
    Webspace->_loadPHosting()
1: /opt/psa/admin/plib/Webspace.php:490
    Webspace->getPHosting()
2: /opt/psa/admin/plib/Webspace.php:460
    Webspace->getSysUser()
3: /opt/psa/admin/plib/Webspace.php:191
    Webspace->getRootPath()
4: /opt/psa/admin/plib/pm/Domain.php:377
    pm_Domain->getHomePath()
5: /opt/psa/admin/plib/modules/joomla-toolkit/scripts/pre-uninstall.php:8
ERROR: PleskFatalException: Site without PhysicalHosting cannot be Webspace (Webspace.php:556)

After installing it again after the error, "plesk ext joomla-toolkit --instances-list" returns nothing, after installing a Joomla instance again once we get "Cannot access offset of type string on string" and the instance is not shown (same issue as before).