Problems installing h5p content/libraries

Hello there,

I am having a problem when installing this plugin after a migration. As you can see in the attached snapshot 3 errors appear when I enter in the H5P libraries´ configuration. As a result, the hub is not connected to my webpage so I can not use H5P contents.

The only way to use some contents is to upload them manually. However, once that I have uploaded some contents it appears this message in the hub:

Content type list outdated

Your site is having difficulties connecting to h5p.test.schulcloud-thueringen.de to check for content type updates. You may not be able to update or install new content types.

Anyone knows which could be the problem?

Thanks in advance!