Likely you have a corrupt font installed.
This ARTICLE might be helpful.
Now, I normally do similar Titles in Photoshop, starting with an appropriate Image Preset, say NTSC 720x480 PAR 0.9, and then extend the Canvas to allow for the longer block of type and images. I Import these into PrPro and then animate the Roll with Effect>Motion>Position Keyframes, using either Ease-In & Ease-Out, or Continuous Bezier. Works a treat.
It's really weird because it's only when I use the Media Encoder that the programme crashes (say if I'm creating a Flash file).
If I go to File > Export > Movie and chose an uncompressed option, it's okay.
Of course, I'm left with a huge file and have to go through another process (input the new uncompressed AVI file and encode from there) but at least it doesn't crash!