It's excellent that you brought up this problem, and I would be happy to assist you. Therefore, the following are the answers in this regard:

Solution 1: Installing QuickBooks Software on the Host or Server

On the computer that is hosting or server, launch QuickBooks.

Selecting Open / Restore Company from the File menu is the next step.

After choosing "Open a Company File," click Next.

After that, locate the firm file and choose it.

Choose the Open File option in Multi-user Mode, and then select Open.

Enter your regular username and password to access the company's file.

Select the File => To close a company file on the server, either logoff or close the company.

Solution 2: Restart the system

The user should log out of the QuickBooks account since sometimes a simple restart will resolve the issue.

You can accomplish this by shutting down the QuickBooks desktop and closing the QuickBooks account.

Next, restart the system.

Finish the procedure by launching QuickBooks and attempting to log in.

Solution 3: Manual procedures to adhere to

The first step is downloading and installing the QB file doctor program on the computer.

Next, run the program and allow it to identify the network.

The software won't be able to access the company file if its hosting mode is off; thus, the user will need to set it on.

The next step is to configure Windows' access permissions.

Now, share the folder and grant permissions in Windows.

Run ipconfig at the end if there is no network connectivity.

Solution 4: To resolve the issue, update the firewall.

Hit the Window + R keys.

After that, type in the Control Panel and press the OK button.

Choosing the system & security option is the next step.

After using the cursor to navigate to the Windows firewall, you must select the check for updates box.

When the system needs updates, it's critical to click the "Update Now" option and wait for the installation to finish

Try restarting the computer to see if the issue still exists.

Solution 5: Launch the QuickBooks Clean install program.

Uninstall Quickbooks

QuickBooks software uninstallation.

Hit the Windows + R keys.

In the control panel, type, then press the OK button.

After selecting Programs and Features, choose Uninstall.

From the list of apps, choose QuickBooks, then click on Uninstall.

To complete the uninstall procedure, you must adhere to the guidelines.

Run the clean install program.

You must download the most recent version of the QuickBooks clean install program in the second step.

Follow the on-screen directions after opening the qbdbmgrn.exe file.

You must click Continue after choosing the desktop version of QuickBooks.

Modify the folder names for the QuickBooks desktop installation.

You will need to utilize the PC's folder option to reflect hidden files as well. All the folders specified for the Windows version should have their names changed. To better distinguish the folders, add old or damaged ones to the last part of the folder name.