The error message “Error Initializing QuickBooks Point of Sale application log. If this happens every time you launch the program, please contact technical support” in QuickBooks Point of Sale Support.

Causes behind error initializing QuickBooks Point of Sale Application Log:
Here are the significant reasons behind the error initializing the QBPOS application log. These are as follows:

Initializing or Launching QuickBooks Point of Sale: This error usually occurs while initializing or launching QuickBooks POS.
Windows System File: Due to damage in Windows system files, this error pops out. It is advisable to fix windows system files as it can impose a significant threat to the system. In Windows, if System or application crashes then it may be due to the corrupt system files.

How to Fix QuickBooks Point of Sale Application Log Error?

Editing the content of QuickBooks Point of Sale Shell Folder
For this, users need to follow some simple steps:

Users need to press Ctrl+Alt+Del altogether from the keyboard and then select Task Manager.
After this, users need to go to the Processes tab and there they need to highlight QuickBooks POS Shell. Then, they should select the End Task.
After that, users need to go to the Windows Start menu and then select Open Windows Explorer or File Explorer.
After that, users need to mark the Hidden item’s checkbox given in the View tab.
For Windows 7 users, they need to follow step four by selecting Organize then selecting Folder and Search Options. After that, they need to This PC or My Computer, and there need to search and go into the given address
C:\Users\{User logged on}\AppData\Local\Intuit\QBPOSShell.exe…\
Note: The above link is the last modified link approved by Intuit QuickBooks.
Users need to right-click the given user. Config file and rename it to user.configold
After that, users need to close the given windows and then open on QuickBooks Point of Sale.