Error Instalation Extansion in Joomla

I can install new extansion events booking in my joomla but any error message ‘Unable to find install package’. I have hosted joomla on 000webhost,
how can i fix it?
thank you

A number of users have let us know that Joomla exceeds the free plan limits to be fair, so I am unsure based on your really basic description what the issue is sadly.

You might be better off posting on the dedicated Joomla support forums and be sure to give as much detail as possible, the basic forum post you’ve posted here is lacking so much information for me to be able to diagnose easily.