PrestaShop installation fails after previous failed attempt in Plesk: Link to database cannot be established

Symptoms

• When installing a PrestaShop application in Plesk at Domains > example.com > Applications, the following error message appears in Plesk:

  PLESK_ERROR: Installation of Prestashop at http://example.com/prestashop failed. Non-zero exit status returned by script. Output stream: 'Link to database cannot be established:
  SQLSTATE[HY000] [1045] Access denied for user 'prestashop_1'@'localhost' (using password: YES)'.
  Error stream: 'Link to database cannot be established:SQLSTATE[HY000] [1045] Access denied for user 'prestashop_1'@'localhost' (using password: YES)'.

• Previous installation of PrestaShop was interrupted/unsuccessful.

Cause

An installation of PrestaShop fails if the previous attempt has been interrupted/unsuccessful.

This is a Plesk bug with ID PPPM-7180, which is planned to be fixed in future product updates.

Resolution

As a workaround, perform the following steps:

1. In Plesk go to File Manager of the domain, where PrestaShop has failed to be installed, and remove the directories that have been created during the previous interrupted/unsuccessful installation:

   
   
   
   

2. Re-run the PrestaShop installation.

Additional Information

• Unable to install PrestaShop 1.7.2.3, 1.7.2.4 with Spanish language: Non-zero exit status returned by script