Resolve the Application Log Issue in QuickBooks POS Quickly

The QuickBooks POS log error usually appears when the software can't initialize its internal logs due to system conflicts or corrupted files. Restart your computer, ensure no other QuickBooks instance is running, then rename the log file from the Shell folder. Once done, reopen QuickBooks Point of Sale, and it should create a new log, bypassing the initialization error entirely.
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https://www.weedclub.com/blogs/business18211/error-initializing-qbpos-application-log-a-guide-to-rectify