some features are missing in toolbox

some features are missing in toolbox, such as purge all - critical CSS - Purge All Unique CSS and Purge All - Gravatar cache (see attached file). I'm missing 3 items.
normally I would have this :
(This is the first time I've seen this problem... Is there a problem with the server or the plugin?
This is causing me problems...and i don't what to do
normally i
best regards