In current version, the after order booking data is not managed properly so the rooms do not get free once an order is canceled.
So you will have to go to the order which is canceled and delete the rooms in that order.
But we are working on this issue in our new version and hopefully, you will get the solution in the upcoming version which will be launch very soon.
It looks like you are using accented (non-latin) characters in the city, state names while creating Hotel.
So for this, you have to enable the "Accented URL" option from Preferences -> SEO & URLs tab https://prnt.sc/rygvjh.
After this save the hotel again and try to search again.
Please increase the value of memory_limit to 500 once on your server and try to upload the images again.
If the issue persists the please create a ticket at https://webkul.uvdesk.com with your Admin login details and FTP credentials.