I have a world with over 1500 in game days played that will not load. It give me a Panda error and tells me that local servers cannot be found. I do have Add-Ons bought and downloaded, when I try to remove them and launch the world, the whole game crashes and sends and error report.
This issue is being tracked at MCPE-228432. It would be very helpful if you could provide a copy of the world.
On PlayStation, you can follow these steps to copy a world save:
Make sure your BLANK USB stick has been formatted to FAT32
On your PlayStation, go to Settings > Application Saved Data Management > Saved Data in System Storage > Copy to USB Storage Device > Select Minecraft > Select Saved World to copy > Copy
This should then copy the world save to the USB, which you can share to a file sharing site such as OneDrive, and then share the link.