I’ve tried restarting the sim many times, I’ve tried restarting PC, my community folder hasn’t changed, there’s only a couple of planes in there and a shorter trees mod.
Working ok for me.
Moved to Tech Talk which is more appropriate whilst others help you troubleshoot 
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Try the following:
Go to Options -> General -> Data and turn off Online Functionality , then save, then back on, then save. This should restore all functionality. If not, then restart the sim.
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