Worked fine for months and now I get this?

[Toast]

 I've been playing online for ages, in fact I was playing just yesterday. went to open it this morning and got this message so I uninstalled, re-installed and got this same message. Any idea how to fix it?

Edited March 22, 2020 by Toast
missed words

[Ra2Nub]

It's your anti virus blocking the file.