Hi @codeware We have not faced such an issue on our end. So we will have to check it on your server.
So please raise a ticket and provide us your FTP details and the URL on which you are trying to do the installation.
https://webkul.uvdesk.com/en/customer/create-ticket/

@lafora

This issue might occur because of server request timeout.

Please make sure your server is configured with the recomended setting for QloApps : https://qloapps.com/install-qloapps/#section-8
Make sure to set server max_execution_time to 500.

If the issue still persist, do let us know.

Hello @Sheik
I have already mentioned this error and its solution in one of the topic.
Please follow this link to get the solution: https://forums.qloapps.com/topic/8/error-during-installation-all-parts-of-a-primary-key-must-be-not-null-if-you-need-null-in-a-key-use-unique-instead-error-sql-has-happened

@strangisgroup Let us assume there are 5 rooms of General Category in a hotel. Mario Brown books a room from 07-06-2018 to 09-06-2018 then for Mario Brown (the customer) check-in date will be 07-06-2018 and the check-out date will be 09-06-2018. And the check-out date of one customer can be the check-in date of another customer. Hence, on 09-06-2018 another customer can check-in in this room.
So if Henry (another customer) books a room for 08-06-2018 to 10-06-2018 then the number of rooms available for him will be 4 rooms, and if he makes a booking for 09-06-2018 to 10-06-2018 then the number of rooms available for him will be 5 rooms.
If all the 5 rooms are booked in that date range then it will not show that room type.