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:

  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:

1. Log in to Plesk.

2. 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:

   
   
   
   

3. Re-run the PrestaShop installation.