DTTG4 on iOS26 - opens, displays list of databases, then closes

DTTG4 on iOS26 - opens, displays list of databases, then closes. I can find no way of actually accessing the databases.

It was previously working.

I have rebooted the iPhone.

Any thoughts please?

Do you mean the application is crashing?
If so, start a support ticket.

This has happened with me a few times on iPad and on iPhone. When it happens, I try to start it two or more times and it works then.