Some images are missing

Issues:

• Cannot redeclare wp_cache_add() ...
• Maximum execution time ...
• Some images are missing.

Solution:

If during the installation of demo content you had this error:

Or after installation, you notice that some images are missing, you do not need to reinstall the demo content after this error. Here is a guide to fix this problem.

1.Install the Regenerate Thumbnails plugin:
https://wordpress.org/plugins/regenerate-thumbnails/

2. In the Tools menu, the entry "image regeneration" will appear:

3. Click on the button marked on the screenshot:

At the end of the image regeneration process, thumbnails for all images will be restored.