1. Please try to connect in "Incognito" browser mode, in Google Chrome browser it can be opened by hotkey combination "Ctrl" "Shift" "N" 

2. Once in incognito mode, please sign in to LodgeiT

 3. Select the required organisation > click "'QuickBooks Online" > you will be redirected to'QuickBooks Online'  page > Sign in to 'QuickBooks Online'  > select the required 'QuickBooks Online'  file to connect.

If it won't help, please contact 'QuickBooks Online'  support team as the error occurs on their side, they should advise the reason why it occurs and probably will fix the 'QuickBooks Online'  file.

'QuickBooks Online'  customer care contact number 1800 114 837