Intouch stopped working getting HTTP error 500 message

good morning,
I am using several max br1 modems for a field iot application and rely on InTouch to access modules in the field. When i add my computer to the vpn the modems are on i can access all the devices with the ip address but when I try to use InTouch remotely I get the attached error. any guidance is appreciated. all modems are on 8.4.0 build 5075.

HTTP ERROR 500 insufficient content written
URI: /index.html
STATUS: 500
MESSAGE: insufficient content written
SERVLET: com.peplink.littlecloud.app.ra.servlet.ProxyServlet-ec1963b