If a user was not granted the proper access rights to all of the files needed to run Labeler, you can download and and extract these files, then run the .bat file to properly set the rights:
For 32 bit versions of Windows: https://dl.waspbarcode.com/wasp/supportfiles/SetReadOK_32.zip
For 64 bit versions of Windows: https://dl.waspbarcode.com/wasp/supportfiles/SetReadOK_64.zip
If you continue receiving the error after running the above, you may also need to browse to C:\ProgramData, then right click Wasp Barcode Technologies and go to Properties, then Security. Click the Edit button, then click Add. In the Enter the object names box, type Everyone, then click Check Names and it should underline Everyone. Click OK. Now check the Allow box for Full Control and click Apply and OK.