Unfortunately, due to security reasons, Google has decided to no longer allow access to their services from browsers embedded within other applications.
If you are currently experiencing this issue, we suggest running the MightyText web app in your browser. If you are using the Chrome browser, we recommend installing the MightyText Chrome extension
Since this is a decision from Google's end, we currently do not have any control over this and it will affect all other apps using embedded browsers as well.
Here is the link to learn more about this decision from Google: