SmartAlbums make piwigo not reachable

[outdoorbits]

Since the last update of piwigo I observe the following problem:

After activation of SmartAlbums the website works for a short time. Then it does not respond anymore. Renaming the plugin folder of SmartAlbums fixes the problem.
Actually I've no idea how to give more debugging information. I'd like to help fixing this.

Thank you!

[plegall]

What was the name of the plugin directory?

[outdoorbits]

The plugin directory is plugins/SmartAlbums.