Plugins can't get downloaded Error 500

Hi

When downloading the

ad widget and the recent comments plugin can't be downloaded using the dashboard. You will receive an Error 500.

Server error status: Internal Server Error [500]

Please check - all other plugins are working fine.

Thanks
Andi

p.s.
Could yu please make this dropdown list of plugins sorted A-Z - I have written that request already more than 3 months ago the first time and until now it is still a complete chaos sorting and very hard to find the correct plugin - i.e. I could not find ad widget!

Thanks