A 500 error is an error coming from your server configuration. Without knowing the exact error, it will be very difficult to diagnose. If you have access to a cPanel, you can check your error logs to see what errors are being displayed after import. Otherwise, you can ask your host if they can give you the error.
Here are some common related server configuration errors that may be the cause. But if you can find the error, we can narrow down the solutions.
If it’s only happening on one demo, it most likely means you’re hitting PHP time, memory or upload limits due to image sizes on that demo. But if this is already resolved, then no need to change the limits.
Do you need help with the other errors are you experiencing with the Portfolio demo?
Hi, Im having similar issues with SIMPLEFLEX.
I have purchase your theme awhile back i’m trying to upload the demo content and i keep getting the 404 error after the upload or a complete blank page. Already did a clean install of wordpress a couple of times.