Troubleshoot chemplan.biz System Loading Issue

My company's system, chemplan.biz, is designed for data analysis and reporting. The system was set up less than a month ago and was functioning as expected. However, 10 days ago, it suddenly stopped loading properly, without any changes being made to it or its environment.

The primary issue to be resolved is the system not loading. It's crucial that this is fixed promptly to restore our ability to analyze and report data effectively.

Key requirements include:
- Identifying the root cause of the loading issue
- Resolving the issue in a timely manner to restore system functionality
- Connect the online version to the desktop. The online version has a function called chemplan online. When the user click this option, desktop version should become active.

The freelancer installed the system says he is busy for few days and can not do it now

Skills and Experience:
- Experience with data analysis and reporting systems
- Strong troubleshooting and problem-solving skills
- Proficiency in system maintenance and debugging
- Excellent communication to provide updates and explanations throughout the process.

If you are interested, I can provide the hosting company, user name and password.