Someone logged into this account from another device or browser. Your current session is terminated in Magento 2 Admin

Go to
Admin > Stores > Configuration > Advance > Admin > Security
Set “Admin Account Sharing” to Yes

Written by Al Mahbub Khan Full-Stack Developer & Adobe Certified Magento Developer

Full-stack developer at Scylla Technologies (USA), working remotely from Bangladesh. Adobe Certified Magento Developer.