sudo apt-get install php-mbstring
If it throws some error try above command after apt-get update
apt-get update
semiconductors, investing, technology, nvidia
backstage, performance
forex, currencytrading, forexanalysis, centralbanks
hacktoberfest, git
edtech, techtalks, ai
wordpress, writing
productivity, discuss, community, buildinpublic
100daysofcode, webdev, javascript, beginners
git, epicgames, github, tutorial
computervision, vlm, informatinextraction, ai
ai, python, javascript, webdev
ai, powerplatform, customersupport