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Recently I have installed my own-made theme on my WordPress and after that a few problems have occurred.

Firstly when I upload a photo or file from my site’s admin panel it
does not show up under Media tab. and when I try to define a thumbnail
for a post I cannot see the photos. Therefore I deactivated my
own-made theme and changed it to 2017 WordPress theme. after that when
I uploaded images they showed up in my Media tab but again when using
one of them as a post thumbnail (after reactivating my theme) they showed up like below:

I’ve tried several ways to fix this issue such as:

1) Deactivating my whole plugins.

2) Increase PHP Memory Limit by editing the wp-config.php file:

define( 'WP_MEMORY_LIMIT', '256M' );

3) Changing file permissions of my site’s uploads folder and etc.

Secondly when I activate my own-made theme some times I see the
popular white screen of death.(For example when I define a new category and press the publish key I get redirected to a white empty page) And I don’t know what problem my theme
has that makes this happen.

What changes must be done to my own-made theme in order to fix the white screen of death and uploads issues?

Read more here: WordPress uploads do not show up and I see the white screen of death in some cases


Solution:

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