I am trying to install AcyMailing on Joomla 3.10.10 but I get Error. Both version 7.8.3 and version 8.3 generate this bug. There is only Error without any numbers. What can I do with this?
Please check your console (F12 in Chrome/Firefox) and check if you see any error in it.
I use Install from Web option and it's work now.
I'm glad you were able to solve your issue. Enjoy your Acymailing!