Magento 2 Google Tag Manager Can't Export JSON File

This article will guide you on how to fix the problem of exporting JSON files. 

This error mainly occurred because of missing the Liquid Template. There are two solutions to fix this:

• Solution 1: Install Liquid Template via Composer.

             Run the following command composer: composer require liquid/liquid to install Liquid Template

• Solution 2: Install Liquid Template manually

             Download Liquid Template via this link. Place Mageplaza file to the following path:

• /lib/internal

Then, run the following command php bin/magento setup:upgrade.

Hope the above detail resolves your issue. Please feel free to contact us if we can be of further assistance.