Thanks for flagging this! The blank page redirect sounds like a bug and we'll look into it.

In the meantime, here's where the thesis lives in case you want to try again:

1. Go to Settings
2. Click Entity Management
3. Edit the fund you want to add a thesis for
4. Fill out the form under the Fund Thesis section and save

If you're still hitting a blank page after trying those steps, let us know and share any screenshots you can grab so we can dig deeper!