Hello @vuster,
One other option, could you please open the Console Tab of your browser and check if you have any error message there that could point us in the correct direction?
To open the Browser Console Tab press, depending on your preferred browser: CNTRL+SHFT+J (for Chrome) CNTR+SHFT+K (for Firefox) or F12 (for Explorer). If you work on a Mac: (CMD+OPT+J for Chrome or CMD+OPT+K for Firefox). This should open a Console Tab on your browser.
After it is open, perform the action that fails, wait about a minute and see of you get any message on the console tab that looks like an error message. Make a screenshot of the Console Tab and send that to me.
Best regards,
Michel