Permission Denied When Uploading to Arduino Uno

Using Arduino IDE 1.x
1

This is a bit of a newbie question, but I would appreciate any help that anyone is willing to provide.

I am just starting out with Arduino Uno on Linux Mint 19.3 and I am trying to run a basic blinking LED program to test out my Uno on the web editor. When I upload, I get the following error:

Overriding Baud Rate : 115200

avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

avrdude done. Thank you.
2

Is your login ID a member of the dialout group?

3

You need to make yourself a member of the dialout group. Have you done that?
If that solves the issue, great. If it doesn't, you might have to get rid of modemmanager.

You can search this site for the keywords in bold; you might have to put a space between modem andmanager, not sure.