@<1523703012214706176:profile|GorgeousMole24> - I can look into this for you. Can you share a screenshot of where you're seeing the "thinking" animation just so I know I'm looking at the same thing you are?

thanks!
sure, I'll record a short video

at some point I click the "open URL in new tab" just to show it works

OK thanks for sharing that, I'll see what I can find out.

thanks!

Let's try something up. Please add index.html to the end of the url.

It worked for me on this example url:

Hi @<1523714264911581184:profile|EnchantingFrog14> !
First, thanks for checking it out!

the url is of some local network computer which I can't share,

is something like:

None

@<1523714264911581184:profile|EnchantingFrog14> here is a more realistic example of a URL that I use:

@<1523714264911581184:profile|EnchantingFrog14>
changing it to index.html will make the url become incorrect ...

Hi @<1523703012214706176:profile|GorgeousMole24>
Can you share an example url?
Maybe there is a public example we can use?

And last, could you please open developer tools (F12) and check if there are any errors in the console?

it is essentially a "file server" (very simple one, written in python) that just shares the files it is requested.
And specifically, that file is a static .html file that has built in it a viewer for protein, I can likely upload here a specific example of such .html file