Magento 2: changes to default.xml in custom theme aren't loaded

Question

My custom theme is not loading any data from default.xml.

I confirmed this by checking the mage file in var/cache directory.

Can anyone please help me by explaining the cases in which default.xml doesn't reflect?

Answer 1

It is possible that the type of your theme is changed to virtual.

You can check the same in table theme. The value in type column has to be 0.

0: Physical

1: Virtual

2: Staging