Why does Wattpad work on the internet but not in the app for the laptop?

I signed up for Wattpad a long time ago. But then I had to change my email address. Today I registered / changed them on Wattpad. Everything works fine on the phone. But I still can't access it on my computer. The new email address is displayed but the "name" always says "an error has occurred". How do I get that?

If available, simply contact technical support.