Sorry just seen you are saying it works on other websites. I don't use Amazon music so can't test with that (I tried and it doesn't let me because I am not subscribed).
Unfortunately, they stopped building 32-bit versions for Linux after Opera 45. You can get that version from the FTP site if you wish, though as you can see it's 8+ months old.
Means that opera could not connect to a notification server. Either because there is no notification server or it is not launched. https://wiki.archlinux.org/index.php/Desktop_notifications
In my case there was no notification server. Instaling one helped, opera finaly is starting normally.
I know the thread is old but maybe it will help someone in the future.
Obviously, Opera can not access system fonts.
If Opera sends the document directly to the printer, it comes to the missing characters, if the print runs through the system, then it does not.
In case other web developers arrive here in search of an answer to localhost invalid SSL certs causing Opera to require re-login after browser restart, the solution is to visit opera://flags/#allow-insecure-localhost to enable the Allow Insecure Loclhost setting then relaunch the browser.
@jayaguru-shishya Exactly, this is the issue unfortunately. Your fix works. I just made a small script that I run each time Opera is updated. Not the best, but a working workaround.