Please make sure you have the latest version of phpvms also make sure your schedules are complete (airline's fleet etc) with first change I will make the error handling in a better way
You need a cms for this and phpvms is one of many available.
I would suggest to see how wamp or xamp works in order to set it up locally and see what the platform can do
For start phpvms v7 is still in alpha stage and you should not use it for a live website . can yoy provide a username a password and the link of your site to have a look at the error ?