Load a model shows empty contents

I have pagebuilder params 1.2.4. When I clicked Load a Model, there were no images showing up. Only the placeholders and the model names.

Also nothing was displayed when I clicked Preview on any of the mdoels.

Please advise.

Hi
this can be a problem between our servers to communicate
do you have something special installed for the security that could be in cause and block this ?
CEd

I found out that the problem occurred on the web sites that use https.

On sites that use http, the Load a Model works fine.

thank you for the info, I'm checkin this

please try now and tell me

Yes it is working now. Thanks for your help. https and http both work.