3454350 - Unable to generate documents

When generating documents, error is thrown:

Sorry for the inconvenience, but there seems to be an error in the system (Error code: [sequence of numbers and letters]). An automatic notification has been sent our way and we'll be fixing the error as soon as possible. In the meantime, you can go back to the login page and continue working in SAP CPQ.

And log error contains:

Access to the path '\\[sequence of numbers]-CPQFile\home\[CPQ environment]\web\mt\[domain]\tempdoc\[sequence of numbers]\[sequence of numbers].docx' is denied.

SAP SALES CLOUD CPQ

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