Ok - new install then....
I would recommend you start over from scratch - delete it all.... files, database - all of it. Install fresh. Do NOT add any skins or modules - no SmartCARS to begin with either. Everything default. Then try adding a few airports, aircraft and schedule - finally test EVERYTHING. once it is all working dorrectl, add one skin or addon module at a time and re-test everything again.. including adding and importing aircraft, airports and schedules. It may be a long process, but you should find what is causing your issues. Installing and adding skins/modules without testing is a recipe for disaster.
Also, use the console in Chrome (or other browsers) to check for errors. There should also be an error_log file in the directory where phpVMS is installed and in the phpVMS admin directory as well. Check these for possible errors too.