Hi @ishant28
i usually encounter that kind of problems when the browser cached the css file. So, changing the css means to delete an attachment and upoloading a new one.
usually, i resolve this by disabling the browsercache and/or ctrl-f5 to reload the page and deleting the serverside cache on /_services/about while beeing logged in as an admin in the portal.
I looked at your site. I think, the first page can not be shown without login due to an access control rule. So the css from the rootpage can also not be loaded...
This is a funny situation.
Either, you let everybody see the homepage with no menues and redirect all users to login via client javescript. This should solve the problem.
Or you create a new path which is publicitly visisble and attach the css there. (and manually reference the css in the template...)
So, i would go for a public visible rootpage which redirects the user directly to login 🙂
Just my opinion.
so, something like (sorry, < characters are kicked out for a good reason...): (not tested)
{% unless user %}
<script language="javascript">
window.location.href="https://hotelnet-service.powerappsportals.com/it-IT/SignIn?ReturnUrl=%2Fit-IT%2F"
< /script>
{% endunless %}on your home template (or even the header template to have it in every page 🙂 )
Have fun,
Christian
PS for the liquid doku see here: https://docs.microsoft.com/en-us/powerapps/maker/portals/liquid/control-flow-tags#unless
PPS where does the tag come from?? did i write @is somewhere??