I cannot install applications. Installations fail with the following error:
Error: Installation of Joomla at <http://example.com/joomla> failed. Invalid values passed for settings of application resource; details for setting with id 'admin_name': Please make sure the text you entered starts with a letter and continues with either numbers, letters, underscores or hyphens.
By default, users have the symbol "@" in their login or there is a symbol that is not a number, letter, underscore, or hyphen in the customer's login.
It could be also caused by a dot(
. ) symbol in the login name.
If you are Plesk administrator and use the subscription owner login as the application administrator, change the customer's login so that it only includes numbers, letters, underscores, and/or hyphens at Home > Customers > customer_name > Change Login Info
If you use another user to administrate the application, make sure that their login only includes numbers, letters, underscores, and/or hyphens.