Here https://ckeditor.com/docs/ckeditor4/latest/guide/dev_easyimage_integration.html (useless tutorial) i can read the next lines:
cloudServices_tokenUrl: 'https://example.com/cs-token-endpoint',
cloudServices_uploadUrl: 'https://your-organization-id.cke-cs.com/easyimage/upload/'
Can somebody know how are to be the php files
cs-token-endpoint.php
easyimage-upload.php
What cause in browser console error Failed parsing 'srcset' attribute value since its 'w' descriptor is invalid.. Thank you.