testflight external status active but nothing to test

My iOS application in prerelease testing process. Last day I sended my application to itunesconnect and send invites to external test group, everything works fine. Everybody was able to test application. Also I’m doing this process for all my other (10+) applications.

But today, I clicked send invites button but till now no e-mail and no application to test in testflight app. Does anyone know a solution/workaround for this problem? Thank you.

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Another interesting detail is when I click on build number there is "Test Information" and "Testers" tabs. Normally I'm able to see external testers there, but this time it says "Internal and external testers can be added in the app’s Prerelease section."

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Solution

After few hours now Apple sended push notification and e-mail for it. Now everybody able to test application. I change nothing in itunesconnect site. Now I'm able to see my external tester under tester tab. (instead of writing "Internal and external testers can be added in the app’s Prerelease section")

If anybody will face with same issue in future, this could be problem at Apple side. Means, be patience and don't worry.

Thank you.