Clientsummary Error

[Thiago C]

Hello,

I am experiencing an issue with the Client Summary page in WHMCS Admin Area.

• WHMCS version: 9.0.6

• PHP version: 8.2.32

• Admin theme: Blend

Even after reinstalling the official templates, clearing the templates_c cache, and disabling addons/hooks, I still get the following error when accessing /admin/clientsummary.php:

TypeError: Cannot access offset of type string on string
... file.clientsummary.tpl.php:309

I compared my clientsummary.tpl file with the one from the full WHMCS 9.0.6 download, and they are identical. The error persists regardless of using the default admin themes.

Has anyone else encountered this issue? Is there a known fix or patch for the Client Summary in 9.0.6?

Thanks in advance for any guidance!

[Damo]

It's a known bug since the 9.0 release.

 

Quote

Although we cannot guarantee it, per our internal notes on the case WHMCS-25580, the fix is expected to be released within the upcoming version 9.0.7.

 

[pRieStaKos]

Try to re-upload `/admin/lang/*.php` files and make sure they got the proper file permissions.

[Damo]

Thanks pRieStaKos  it is a different issue to the one I posted about. 

[Thiago C]

On 8/3/2026 at 9:40 PM, pRieStaKos said:

Try to re-upload `/admin/lang/*.php` files and make sure they got the proper file permissions.

I change my main languague to english and this solve the problem, thank you!