Microsoft Dynamics Nav – Either the caller does not have the required permission or the specified path is read-only – Error

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Today on Microsoft Dynamics Nav 2013R2, I kept getting the following error, which stumped me for a bit…

Either the caller does not have the required permission or the specified path is read-only.

After much investigation, I found a solution to the problem, delete the following folder and restart the service.

C:ProgramDataMicrosoftMicrosoft Dynamics NAV71Server{Nav Instance Name}usersdefault

Upon restarting the service, I was able to connect back to Nav without receiving the error.

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