Hello and welcome!
Can you format your post according to these guidelines to maintain readability?
I added an host double.
Now, I am not able to show all
Not sure what this means, or what you’re trying to do.
This looks like an Icingaweb2 error, it would be useful to know which version of Icinga2 and Icingaweb2 you are using, which Icingaweb2 modules are installed (and their versions).
Likely a missing Icingaweb2 module or a version mismatch, but it could be a missing PHP package on your system as well. Which version of PHP are you using?