Nobody can tell you much without exact system information or things like exact version of AE.
Version AE 2017.2
System Windows 10 version 1607
Intel core I7-6700HQ 2.6ghz
In fact Ae was running and I wanted to open Browse effect so the pgm wanted that I install Bridge. I do it and then the bug appaears ! So I desinstall Bridge, I desinstall AE. Then I re-Install AE but it doesn't work anymore :-(((
Am I alone in this case ????
Is there somebody on this Forum ???
Are you trying to add an animation preset or the like? Does it interfere with your workflow after clicking through the dialog box?