Invisalign aligner has a defect, part of the plastic folded inward. Should I wear it or keep using the previous tray? (Photo)

As always, give your dentist a call to update them with your current situation.  
- Did you notice the bend before or after attempting to insert the aligner on your teeth?- Is your dentist's office closed the next 3 days or they're not taking appointments for the next 3 days? I only ask because they can give you verbal tips over the phone.
That being said, there are options to try on your own.....
1. Call Invisalign and speak to a customer service representative and see what they say.2. Attempt to straighten out the part that folded3. Cut that part off and file down with an emery board to smooth the edges4. When in doubt, just keep wearing the previous aligner until you're able to see your Invisalign provider.
Hope this helps.

Hello,
Based on the picture provided, I believe that the defect is caused from the repeated efforts of removing the tray with finger or finger nails. However, it is not a big issue I recommend to first contact your dental provider, if it is urgent I would recommend to try to fold back the small area and continue wearing the tray until you can bring up the issue to the dentist.