Connection issues - WiFi or mobile (cellular) data
• Internal Server Errors (ISE) primarily arise from local connection issues.
• Using a stable 5G Wi-Fi connection inside my condo resulted in no ISE during the last PvP wave.
• However, on the balcony, the same connection occasionally caused ISE, and switching to mobile data improved stability.
• Mobile data inside concrete walls proved less reliable. So do concrete walls between your router and your device.
• For optimal signal reception, avoid obstructions between the router and the device.
• If connection problems persist, consider using a signal booster.
Some can increase your signal strength up to 32 times.
https://www.ubersignal.com/blogs/articles/20-easy-ways-improve-cell-phone-signal#:~:text=Cell%20phone%20signal%20boosters%20are,your%20home%2C%20business%20or%20vehicle.