QB error 15215 is maintenance release error. When there is maintenance release error with your QuickBooks accounting software the server doesn’t respond and restricting access.
The predicted cause for this error is by incorrect configuration of Microsoft Internet Explorer (IE). In a process to safeguard your PC and the data saved QuickBooks attempts to verify the digital signature on all files that are downloaded through the program. If QuickBooks fails to verify the digital signature of a file that you are trying to download the error is sure to occur.
How to Fix QB Error 15215
QuickBooks Error 15215
For the resolution of this download the latest version of Internet Explorer from the Microsoft Download Center.
If you have installed the latest version of IE still you receive the error after attempting the resolutions mentioned above. It is possible that one or more of your Microsoft Windows program files may be unstable. Intuit does not provide technical support for Windows products. Contact or visit:
The Microsoft Help and Support Web site
Your system or network administrator
The vendor from whom you purchased your computer.
A local computer consultant.
If the above solution does not resolve the issue or answer your question, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site introduced by Intuit or you can connect with the QuickBooks technical support for guidance and error fixation.
There are a number of third party file repair companies that can fix this issue instantly.