Installation and server related problems

I am using Hostinger for a Drupal H5P server. When I try to upload images or video over ~6Mb the site freezes and eventually loads install.php. 

I can go back to the content page but any content that has caused a freeze during production will not load and go to install.php again. The Drupal log has the 2006 mysql server has gone away error.

Hi I have WP installed and have the H5P add-in installed but get error that it cant connect to the H5P hub, and an upload gives an "Error could not load contect type"

If you try and add new content it says "No Content Types available."

1. After adding X-Content-Type-Options header with the nosniff option, scripts from the h5p plugin were blocked because of wrong MIME types
2. Wordpress 4.9.5
3. Desktop
4. Chrome, Firefox
5. H5P plugin Version 1.10.1
6. InteractiveVideo 1.17
7. Browser console errors:

Mozilla Firefox: