I monitor my site vistis with Matomo (formerly Piwik).
For this purpose I have the Piwik Analytics Mod enabled and I noticed that the TPShout module is having problems: after posting a shout I get a white screen.
With the Piwik Analytics Module disabled everything is ok.
It is not really necessary to have this module installed because you can also create a (bottom) block with the tracking code in it and than the TPShout module is working without any problems and also the site visits are monitored with Matomo (piwik).
If you experience the same problems you can try the above.