error

In order to make the site display faster,
After entering the cache plug-in “WP Fastest Cache”
There was a part where there was no image on the top page and deleted.

then,
In “wp-config.php”
I thought that the part of ‘define (‘ WP_DEBUG ‘, true);’ seems to be wrong, so when I fix it, I returned it because it turned out to be a casual display. Then, the following display will be displayed on the top,

We are vulnerable to these errors, so how can we fix it
Thank you.

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