Hi,
Left click the wampmanager icon ( the W in the system tray ) -> PHP -> PHP Extensions
You should see another menu appear containing a long list of extension names.
Active ones have a tick beside them.
Click the one called php_mbstring and give wamp a few seconds to restart Apache, that will happen automatically.
You may need tor eload the PHP version for everything to work properly:
Wampmanager icon->PHP-Versions->5.5.12 then click on 5.5.12
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Wampserver 3.1.7 32 bit - Apache 2.4.38 - PHP 7.3.2/7.2.15/7.1.26/7.0.33/5.6.40 - MySQL 5.7.25 - MariaDB 10.3.12
Wampserver 3.1.7 64 bit - Apache 2.4.38 - PHP 7.3.2/7.2.15/7.1.26/7.0.33/5.6.40 - MySQL 5.7.25/8.0.14 - MariaDB 10.3.12
PhPMyadmin 4.8.5 - MysqlDumper 1.24.5 on W10 and W7 Pro 64 bit
Documentation Apache -
Documentation PHP -
Documentation MySQL -
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