Since 2 weeks a use my new Apple iMac M1 with macOS Big Sur 11.4. I installed Manager 21.6.60 Dutch version. Manager crashes when printing a sales invoice. The crashreport is automatically sent to Apple. I can sent you the content of the crashreport.
First, you are many versions behind. There were some bugs that affected Macs that were fixed many versions ago. Download and install the latest version here: Download | Manager.
Second, if the problem persists, you need to furnish more information. Describe exactly what you did in what sequence to cause the problem. If an error dialog box appears, post a screen shot of it. (Not the macOS crash report.)
I can assure you Manager version 21.7.22 runs smoothly on Mac M1 macOs Big Sir 11.4.
Please follow Tut’s advice. It is very likely that the problem lies in the version you are using.