Issue:
We are using version 1.2.3 of module M2MetaTagsTemplate on our site. When using template '[product_description]' and description set config 'Use Default Value' in the Scope Storeview, we are facing an issue
The issue just happens with the product without Description.
Solution:
To solve the issue above, we have modified this file app/code/Bss/MetaTagManager/Helper/Data.php
Please apply this file to your site to fix the issue.
If you have any issues, please feel free to contact us.
We'd like to help.