gafrol Welcome to the community!
Your modem has been online for 93 days. Please restart it once. If you still have the same error, I recommend the following tip from the Internet:
If you recently encounter limited speed acceleration, or unable to reach maximum connection speed, please try to disable the following features: AiProtection, Traffic Analyzer, Web History, Adaptive QoS, Game boost, Web & apps filters, bandwidth monitor, Mobile Game Mode to maintain the optimal internet speed.