Adobe Aero Crashing and the Document Failing

Hello Adobe Aero i am facing an issue on Adobe Aero which is i need this specific document because i want to apply changes on my QR code but suddenly this document crashed and stopped working. When i click on the document its either they give me a description that someone else is using this document even though no one is and then they keep saying failed. What should i do that is the solusion to this problem. Please reply ASAP and thank you.