When the WordPress Install button is pressed (including the custom install option) in Application Vault, a progress bar is shown but never changes from 0%.
Log into Plesk.
Click "Tools & Utilities" > "Application Vault" > tab "My Apps".
Try installing the app. Here, the notification bar shows:
Please wait.... 0%
This bar may remain the same for several hours with nothing happening.
A large number of applications are stuck in the
psadatabase by following the instructions in KB #213904125
Log into MySQL and access the
MYSQL_PWD=`cat /etc/psa/.psa.shadow` mysql -uadmin psa
"%plesk_dir%"\\MySQL\\bin\\mysql.exe -uadmin -p<Plesk Admin Password> psa -P8306
Check the long tasks that are present on the server:
mysql> select * from longtasks;
Delete these tasks:
mysql> truncate longtasks;
mysql> truncate longtaskparams;
/etc/localtimefile has 644 permissions:
# chmod 644 /etc/localtime
Try installing the application again.