Webpage button not responding Morph browser

I have a new Posteo.de mail account. Most of the times, I view email in Dekko2 client on my UT Volla Phone. About two weeks ago, I tried to use Posteo webmail in my phone's Morph browser. This does not work. Sign in is okay, but if you press Send after composing a new email it fails. Message is “An error occured. Request timed out.” Sending a Posteo webmail on UT through the alternative browser Demo works. It only fails in Morph. Another user of Morph browser said it used to work in Morph too, but it stopped at upgrade to OTA-24. https://forums.ubports.com/topic/8434/webpage-button-not-responding-morph-browser/