We first noticed this yesterday, and lots of other Libraries elsewhere started reporting this problem overnight.

Taylor & Francis have changed their infrastructure. The consequence is that many articles will not open directly in MultiSearch. The side-frame appears, but the left-hand portion of the screen remains blank.

At the moment, you can use the Additional Options link at the bottom of the  side-frame to open 360 Link which normally contains a direct link to the article. From tomorrow, there will also be an option to Open content in new tab, again at the bottom of the side-frame which should work.

A little later in the week we should be able to add a prompt to the, currently blank, left-hand portion of the screen to help.