Instructions on how to do this:

https://www.pcmag.com/how-to/how-to-clear-your-cache-on-any-browser

or... to save time....you can just poke around in your Settings on your browser and you will find it, easily.

Then try to see the Twitter posts. If that doesn't cure your problem, something else is going on.

I cleared the cache and that seemed to help.

for your ad blocking plug-ins to make sure they are not blocking the twitter servers.