Niara theme error: Attempt to modify property "value" on null

[30knees]

I'd like to test the Niara theme. I installed it but am getting this error when I open the website:

Error
Attempt to modify property "value" on null
when rendering smarty template /themes/niara/modules/blockcart/includes/dropdown.tpl
Source file: /themes/niara/modules/blockcart/includes/dropdown.tpl

Does the Niara theme work with tb 1.4 and PHP 8.1? I thought Niara is the default theme now.

[e-com]

You have very old theme templates.
Download the current ones from github: https://github.com/thirtybees/niara

[30knees]

The same error pops up after deactivating the block cart module for public_html/themes/niara/./breadcrumb.tpl

[30knees]

1 hour ago, e-com said:

You have very old theme templates.
Download the current ones from github: https://github.com/thirtybees/niara

Thank you! I wrongly thought it gets updated together with the store. Installing the current ones fixed the problem but led to a new one:

TypeError
Unsupported operand types: string - string
when rendering smarty template /themes/niara/product.tpl

Is this related to PHP 8 by any chance? My lay-person's internet search leads me to think this may be the case.

[e-com]

3 hours ago, 30knees said:

TypeError
Unsupported operand types: string - string
when rendering smarty template /themes/niara/product.tpl

Is this related to PHP 8 by any chance? My lay-person's internet search leads me to think this may be the case.

That's right, it's related to PHP 8.
Somewhere in code is mathematical operation of subtraction on strings.
PHP 7 ignores it, but PHP 8 already generates an error.
You need to check exactly in error log where the string subtraction occurs.

 

[30knees]

Hi @datakickAre there plans to update Niara to PHP 8? 

[datakick]

I don't have any issues even on php8.2

[e-com]

21 hours ago, 30knees said:

Hi @datakickAre there plans to update Niara to PHP 8? 

Error definitely does not come from thirty bees and niara theme. Surely it is generated by some module plugged into hook on the product page.