You are a software development employee at a technology company, tasked by your supervisor to lead a project aimed at creating a new mobile application to enhance customer engagement. The success of this project is critical for the company's growth strategy and maintaining competitiveness in the market. However, despite your team's hard work, progress has been minimal, and numerous challenges have been encountered along the way. Your supervisor is expecting a progress report detailing the project's status and accomplishments to date $($see progress report below$).$

Task: Write an email to your supervisor, adopting the indirect approach, to explain the lack of progress $($note: your task is not to write the progress report itself, but the email containing the attached progress report$).$ Start with a buffer to soften the impact of the bad news, provide an explanation for the lack of progress and the challenges faced, and conclude with a courteous close.