[Skip to main content](#vessel-content) # PDF invoice plugin 5.2.21: "Call to a member function get() on null" on HikaShop ## - **[Lumiga](/forum/user/31479-lumiga "View Lumiga's Profile")** - [![Lumiga's Avatar](https://www.hikashop.com/media/kunena/avatars/resized/size144/users/avatar31479.png)](/forum/user/31479-lumiga "View Lumiga's Profile") Topic Author - [ Away](/forum/user/31479-lumiga) Less More - Posts: 640 - Thank you received: 26 - - - 1 hour 17 minutes ago [\#100000709](#100000709) by [Lumiga](/forum/user/31479-lumiga "View Lumiga's Profile") *[PDF invoice plugin 5.2.21: "Call to a member function get() on null" on HikaShop](/forum/25-install-update/100000146-pdf-invoice-plugin-5-2-21-call-to-a-member-function-get-on-null-on-hikashop#100000709 "-- HikaShop version -- : 6.8.2 -- Joomla version -- : 6.2.1 -- Browser(s) name and version -- : Chrome 156.0 -- Error-message(debug-mod must be tuned on) -- : Call to a member function get() on null JROOT/plugins/hikashop/attachinvoice/attachinvoice.php:59 plgHikashopAttachinvoice->__construct() - hikashop_import() administrator/components/com_hikashop/helpers/helper.php:757 listing() administrator/components/com_hikashop/views/plugins/view.html.php:147 Dear HikaShop team, After updating to PDF invoice plugin 5.2.21, opening HikaShop > System > Plugins gives a fatal error: Call to a member function get() on null JROOT/plugins/hikashop/attachinvoice/attachinvoice.php:59 plgHikashopAttachinvoice->__construct()   - hikashop_import() administrator/components/com_hikashop/helpers/helper.php:757   listing() administrator/components/com_hikashop/views/plugins/view.html.php:147 Cause: Line 59 in the constructor reads the plugin parameters:   self::$zeroVatSupply = (string)$this->params->get('zero_vat_supply', 'services'); When the plugin is instantiated through hikashop_import() on the plugins listing, no params are passed to the constructor, so $this->params is null and the page crashes. Fix (tested on our site):   self::$zeroVatSupply = $this->params ? (string)$this->params->get('zero_vat_supply', 'services') : 'services'; With this null check the plugins page opens normally again. Could you include this fix in the next release, so it isn't lost when we update the plugin? Kind regards, Lumiga")* was created by *[Lumiga](/forum/user/31479-lumiga "View Lumiga's Profile")* -- HikaShop version -- : 6.8.2 -- Joomla version -- : 6.2.1 -- Browser(s) name and version -- : Chrome 156.0 -- Error-message(debug-mod must be tuned on) -- : Call to a member function get() on null JROOT/plugins/hikashop/attachinvoice/attachinvoice.php:59 plgHikashopAttachinvoice->__construct() - hikashop_import() administrator/components/com_hikashop/helpers/helper.php:757 listing() administrator/components/com_hikashop/views/plugins/view.html.php:147 Dear HikaShop team, After updating to PDF invoice plugin 5.2.21, opening HikaShop > System > Plugins gives a fatal error: Call to a member function get() on null JROOT/plugins/hikashop/attachinvoice/attachinvoice.php:59 plgHikashopAttachinvoice->__construct()   <- hikashop_import() administrator/components/com_hikashop/helpers/helper.php:757   <- PluginsViewPlugins->listing() administrator/components/com_hikashop/views/plugins/view.html.php:147 Cause: Line 59 in the constructor reads the plugin parameters:   self::$zeroVatSupply = (string)$this->params->get('zero_vat_supply', 'services'); When the plugin is instantiated through hikashop_import() on the plugins listing, no params are passed to the constructor, so $this->params is null and the page crashes. Fix (tested on our site):   self::$zeroVatSupply = $this->params ? (string)$this->params->get('zero_vat_supply', 'services') : 'services'; With this null check the plugins page opens normally again. Could you include this fix in the next release, so it isn't lost when we update the plugin? Kind regards, Lumiga --- Kind regards, Lumiga Please [Log in](/login?return=aHR0cHM6Ly93d3cuaGlrYXNob3AuY29tL2ZvcnVtLzI1LWluc3RhbGwtdXBkYXRlLzEwMDAwMDE0Ni1wZGYtaW52b2ljZS1wbHVnaW4tNS0yLTIxLWNhbGwtdG8tYS1tZW1iZXItZnVuY3Rpb24tZ2V0LW9uLW51bGwtb24taGlrYXNob3A/dG1wbD1tYXJrZG93bg==) or [Create an account](/component/users/registration?Itemid=101) to join the conversation. 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