If you are trying to download an invoice but the system just spins endlessly, it could be because your browser is blocking the download.
Chrome
To enable automatic downloads on Chrome:
Go to Settings > Privacy and Security > Site Settings > Additional permissions > Automatic downloads
Press Add next to Allowed to automatically download multiple files
Add the M2X URL
To ensure you aren’t prompted for a location on each individual file:
Go to Settings > Downloads
Choose a default download location
Turn OFF “Ask where to save each file before downloading”