Cannot send document for e-sign and no specific error message

When I tried to send a doc for e-sign today on https://acrobat.adobe.com, I keep getting the error message "sorry, something went wrong". This has never happened before.

When I tried to click on the 'i' (which I supposed would've at least explain what was the error about) - nothing came up.

Why I'm requesting for e-sign via the web app instead of in-app is because there is no password function in-app. 

Why am I encoutering this error and why can't you standardise the web app and in-app features?

Why am I paying so much for this faulty app?