Notice: Undefined index: getUpdateOnlineCart while upgrading to 2.2.4 to 2.3.1

[rbalamuruga]

Upgrading to Magento 2.3.1 from 2.2.4, While running command php bin/magento setup:upgrade command, it is throwing notice

Notice: Undefined index: getUpdateOnlineCart in /var/www/html/MyProject/vendor/magento/framework/Reflection/MethodsMap.php on line 81

Can anyone please guide me that what Im missing here? In case any additional details needed to resolve this problem please mention.

Thanks.

[seanbreeden · Accepted solution]

Check your codebase for "getUpdateOnlineCart". It's probably something in one of your theme files. Try disabling the module that contains it then retry php bin/magento set:up

[rbalamuruga]

Hey @seanbreeden thanks for helping me to resolving this error, It is not in theme files but i disabled the module which it contains that code. Then it works. 

[sylvain_michel]

Hey @rbalamuruga ,

Was it this extension ?

https://www.magestore.com/features/magento-2-pos

[faishal_siddiqui]

Yes, this issue is occurring due to Magestore Webpos module, please give me solution if you have any

[faishal_siddiqui]

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@sylvain_michel wrote:

Hey @rbalamuruga ,

Was it this extension ?

https://www.magestore.com/features/magento-2-pos

---

Yes, this issue is occurring due to Magestore Webpos module, please give me solution if you have any