On your phone, tap the gear icon for Settings. Then tap General, then scroll down to Date & Time. Check your settings there.
After that come back and let us know if the eBay app is still giving you problems. If it is, you should be able to access eBay from a web browser for the time being until the app receives an update.
Shake your device while the app is open to file a tech report. If that doesn't work because of the error message, go to the website and file a report by clicking the ? icon on the lower right corner of the page.
